We should all remove our coins, tokens, and crypto from exchanges and into secure wallets where only the user has the private key and can access the wallet.

Here are some great wallets for holding your crypto:

1. Coinbase Wallet
2. Metamask
3. Exodus
4. Trust Wallet
5. Ledger Nano X(Hardware/Cold)
6. Trezor Model T(Hardware/Cold)
7. Ledger Nano S(Hardware/Cold)

Photo by olieman.eth on Unsplash

More specifically proof-of-work solves the “double-spending problem,” which is trickier to solve without a leader in charge. If users can double-spend their coins, this inflates the overall supply, debasing everyone else’s coins and making the currency unpredictable and worthless.

Double-spending is an issue for online transactions because digital actions are very easy to replicate, which is what makes it trivial to copy and paste a file or send an email to more than one person.

Proof-of-work makes doubling digital money very, very hard. It’s much what it sounds like “proof” that someone has done a significant amount of computations.

How proof-of-work works

Bitcoin is a blockchain, which is a shared ledger that contains a history of every Bitcoin transaction that ever took place. This blockchain, as the name suggests, is composed of blocks. Each block has the most recent transactions stored in it.

Proof-of-work is a necessary part of adding new blocks to the Bitcoin blockchain. Blocks are summoned to life by miners, the players in the ecosystem who execute proof-of-work**.** A new block is accepted by the network each time a miner comes up with a new winning proof-of-work, which happens roughly every 10 minutes.

Finding the winning proof-of-work is so difficult the only way to provide the work miners need to win bitcoin is with expensive, specialized computers. Miners will earn bitcoin if they guess a matching computation. The more computations they churn out, the more bitcoin they are likely to earn.

What computations are the miners making exactly? In Bitcoin, miners spit out the so-called “hash,” which turns an input into a random-looking string of letters and numbers.

The goal of the miners is to create a hash matching Bitcoin’s current “target.” They must create a hash with enough zeroes in front. The probability of getting several zeros in a row is very low. But miners across the world are making trillions of such computations a second, so it takes them about 10 minutes on average to hit this target.

Whoever reaches the goal first wins a batch of the bitcoin cryptocurrency. Then the Bitcoin protocol creates a new value that miners must hash, and miners start the race for finding the winning proof-of-work all over again.

Source: CoinDesk

To put it simply: Proof of stake is basically a process used to validate crypto transactions through staking.

Both proof-of-work and proof-of-stake are what are called “consensus mechanisms,” the method by which a blockchain maintains its integrity. Consensus is what addresses the “double spending” problem of digital money. If there were any way the user of a cryptocurrency could spend their coins more than once, it would undermine the entire system. The currency would be worthless.

This is a tricky problem, especially with online currencies that have no central authority, such as a bank or a government, to keep track of how much money each person has, how they’re spending it, and whom they’re paying.

The Bitcoin network was the first to solve this problem with proof-of-work. Proof-of-stake has emerged as a possible alternative that some researchers think is both more energy-efficient and more secure, though there’s debate about this.

In PoS, the nodes of the network commit “stakes” of tokens for a set period of time in exchange for a chance at being selected to produce the next block of transactions. The node that’s chosen - referred to as the “validator” - will receive the block rewards in the form of the native token of the network.

How does proof of stake work?

To answer the question “what is proof of stake,” we must first define what it means for blockchains to achieve consensus.

Blockchain is a decentralized distributed ledger of transactions. Because there’s no single server controlling the network, there has to be some way for everyone to agree on which transactions are valid. Otherwise, it would be possible for people to create fake transactions.

The servers in a blockchain are called “nodes.” Nodes process transactions. Some nodes have the ability to add blocks of transactions to the chain, maintaining and growing the ledger. In Proof of Work (PoW) networks (which we’ll cover later) like Bitcoin, these nodes are referred to as “miners.”

For PoS, nodes commit funds to the network - a process known as “staking” - for a chance to be chosen as the next block writer instead of nodes competing with each other to be rewarded for solving cryptographic puzzles, as is the case with PoW.

In PoS networks, nodes that can add blocks are called “validators,” which are individuals who are responsible for verifying transactions on a blockchain. Each validator has a chance at being selected to write the next block and receive its rewards.

It’s kind of like a lottery - the larger the stake of tokens committed, the higher odds that node has of being chosen. “The choice of the next block writer, the next validator, is a pseudo-random process that’s determined by the size of the stake that you as the user have dedicated to the network,” says Daniel Gould, CEO, and co-founder of Nodamatics.

PoS can improve upon some of the biggest problems presented by PoW, namely:

Energy consumption: PoS requires less energy than PoW.

Transaction throughput: PoS networks can handle more transactions than PoW.

Scalability: PoS networks can scale more easily than PoW networks.

A quick tip: For a deeper understanding of PoW and how it first made digital currency possible, read the Satoshi Nakamoto white paper.

Which cryptocurrencies use proof of stake?

A growing number of the most popular cryptocurrencies use some variation of the PoS protocol. Here’s a partial list:

• Cosmos (ATOM)
• Cardano (ADA)
• Polkadot (DOT)
• Solana (SOL)
• VeChain (VET)
• Tezos (XTZ)

These networks aim to accomplish a variety of different tasks.

Cardano and Solana are focused on providing smart contract functionality, much like Ethereum.

Cosmos helps different blockchain communicate with each other.

Tezos is designed to allow for the creation and trading of security tokens.

Because there is no “mining” involved in PoS, PoS networks often start with a “pre-mine,” where the entire supply of tokens is brought into existence at once.

SUMMARY

• Proof of Stake (PoS) is a consensus protocol - or a set of rules or system of agreement - that’s used to validate cryptocurrency transactions.
• PoS redefines how blockchain nodes agree on which record of crypto transactions is accurate and improves upon the Proof of Work (PoW) system.
• PoS requires validators to stake tokens to validate transactions, while PoW requires miners to solve a cryptographic puzzle.

The code and the agreements contained therein exist across a distributed, decentralized blockchain network. The code controls the execution, and transactions are trackable and irreversible.

Smart contracts permit trusted transactions and agreements to be carried out among disparate, anonymous parties without the need for a central authority, legal system, or external enforcement mechanism.

Smart contracts are made possible by blockchains, a network of computers that work together to enforce rules on the network without requiring the help of an intermediary.

How smart contracts work

Smart contracts work by following simple “if/when…then…” statements that are written into code on a blockchain. A network of computers executes the actions when predetermined conditions have been met and verified. These actions could include releasing funds to the appropriate parties, registering a vehicle, sending notifications, or issuing a ticket. The blockchain is then updated when the transaction is completed. That means the transaction cannot be changed, and only parties who have been granted permission can see the results.

Within a smart contract, there can be as many stipulations as needed to satisfy the participants that the task will be completed satisfactorily. To establish the terms, participants must determine how transactions and their data are represented on the blockchain, agree on the “if/when…then…” rules that govern those transactions, explore all possible exceptions, and define a framework for resolving disputes.

Then the smart contract can be programmed by a developer – although increasingly, organizations that use blockchain for business provide templates, web interfaces, and other online tools to simplify structuring smart contracts.

With conventional contracts, a document outlines the terms of a relationship between two parties, which is enforceable by law. If one Party A violates the terms, Party B can take Party A to court for not complying with the agreement. A smart contract fortifies such agreements in code so the rules are automatically enforced without courts (or any third party) getting involved.

Benefits of smart contracts

• Speed, efficiency, and accuracy: Once a condition is met, the contract is executed immediately. Because smart contracts are digital and automated, there’s no paperwork to process and no time spent reconciling errors that often result from manually filling in documents.
• Trust and transparency: Because there’s no third party involved, and because encrypted records of transactions are shared across participants, there’s no need to question whether information has been altered for personal benefit.
• Security: Blockchain transaction records are encrypted, which makes them very hard to hack. Moreover, because each record is connected to the previous and subsequent records on a distributed ledger, hackers would have to alter the entire chain to change a single record.
• Savings: Smart contracts remove the need for intermediaries to handle transactions and, by extension, their associated time delays and fees.

What can smart contracts be used for?

Some common ways of using smart contracts are:

• Multisignature accounts: Funds can only be spent when a required percentage of people agree.
• Encoding financial agreements: Manage agreements between users. Say, if one person buys insurance from an insurance company, the rules of when the insurance can be redeemed can be programmed into a smart contract.
• Agreements based on the outside world: Pull in data from the outside world (financial, political, or whatever) with the help of oracles.
• Provide the third party: Similar to how a software library works, smart contracts can work with other smart contracts in a chain.
• Storage: Store information about an application, such as domain registration information or membership records. Storage in a blockchain like Ethereum is unique in that the data is immutable and can’t be erased.

Examples of blockchain platforms supporting smart contracts

• Bitcoin: Provides a Turing-incomplete script language that allows the creation of custom smart contracts on top of Bitcoin like multisignature accounts, payment channels, escrows, time locks, atomic cross-chain trading, oracles, or multi-party lottery with no operator.
• Cardano: A blockchain platform for smart contracts, using proof of stake
• Ethereum: Implements a Turing-complete language on its blockchain, a prominent smart contract framework.
• EOS.IO: A blockchain platform for smart contracts
• Tezos: A blockchain platform modifying its own set of rules with minimal disruption to the network through an on-chain governance model

Ethereum(ETH)

With the advent of WEB 3.0 and Ethereum 2.0, Ethereum is set to become the most popular and most used cryptocurrency. Then there’s the Ethereum Naming Service. Look just own 0.01 of ETH. Please do. Ethereum is that crypto that has so much potential. It can be used for so many things. Most metaverse tokens are built on Ethereum. Most Defi tokens are built on Ethereum. This should tell you something about the coin. So just make an effort to own this. Even just 0.01 ETH. That’s enough.

Bitcoin(BTC)

Bitcoin is the biggest crypto right now and it still has the potential to grow. Buy it now and forget about it.

Metaverse Index Token(MVI)

The metaverse is hyped right now. I believe it’s going to continue to grow. Buy this and you should be good.

Others to include that have potential: Dogecoin, Solana, Decentraland, Binance Coin, Uniswap, Binance USD, and Shiba Inu

NB: This article is not financial advice. Do your research. I recommend you start with Web 3.0, Metaverse, and Defi.

To finalize, if you’d like to invest in the aforementioned cryptocurrencies then invest with Binance and get 5%: Buy and Trade Crypto With The Best Exchange: Binance

Have a great day everyone!

Photo by Executium on Unsplash

1. Bitcoin(BTC)

2. Ethereum(ETH)

3. Dogecoin(DOGE)

4. TetherUS(USDT)

5. Ripple(XRP)

Go check them out, especially with Dogecoin. Implement the HODL technique. This drop and rise so don’t be afraid and only invest money you don’t mind losing.

To buy these I suggest you try Binance using this link, you’ll get 5%: Binance

See you next time. Stay safe!