what are the cryptocurrencies

Back to basics: what are cryptocurrencies?
A cryptocurrency (or "crypto") is a digital currency that can be used to invest, save, or purchase goods and services that is protected by cryptography, making it nearly impossible to counterfeit or double-spend. Many cryptocurrencies are decentralized networks based on blockchain technology, such as a distributed ledger, or ledger, enforced by a network of computers, with strong cryptography to secure online transactions.
A defining characteristic of cryptocurrencies is that they are decentralized, meaning they are generally not issued by any central authority, making them theoretically immune from interference or "manipulation" by any government.
How did cryptocurrencies start?
Bitcoin was the first cryptocurrency, created by Satoshi Nakamoto. Or rather, this is the name used by the alleged pseudonymous person or persons who developed bitcoin. Although we don't know who Satoshi Nakamoto is or was, we do know what he did: he invented the bitcoin protocol and published it in a scientific paper via the Cryptography Mailing List in October 2008 titled "Bitcoin: An Electronic Peer-to-Peer Cash System". same". As part of the implementation, Nakamoto also designed the first blockchain database.
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How do cryptos work?
Unlike the US dollar or the euro, there is no central authority that manages and maintains the value of a cryptocurrency. Instead, these tasks are distributed among the users of a cryptocurrency over the Internet.
As we said before, cryptocurrencies work using a technology called blockchain (or block chain), which is a decentralized technology distributed over many computers that manages and records transactions. These are organizational methods to ensure the integrity of transactional data, making it an essential component of many cryptocurrencies.
Proof of Work – This is a method of verifying transactions on a blockchain in which an algorithm provides a mathematical problem that computers compete to solve. Each participating computer (called a "miner") solves a mathematical puzzle that helps verify a group of transactions (called a block), and then adds them to the blockchain ledger. The first computer to do so successfully is rewarded with a small amount of cryptocurrency.
Proof of Stake – To reduce the amount of energy required to verify transactions, some cryptocurrencies use a proof-of-stake verification method. With it, the number of transactions each person can verify is limited by the number of cryptocurrencies they are willing to "stake" for a chance to participate in the process. If a stake owner is chosen to validate a new set of transactions, they will be rewarded with crypto (sometimes in the amount of aggregate transaction fees from the transaction block). To fight against fraud, if someone is chosen and verifies the invalid transactions, he loses a part of what he wagered.
Advantages of cryptocurrencies
Facilitate the transfer of funds directly between two parties, without the need for a third party such as a bank or a credit card company (immediate and secure transfers).
Low processing fees, avoiding the high fees of banks and financial entities for electronic transfers.
Anonymity to protect the privacy of users (there is no possibility of leaking personal information).
Decentralization: It is not tied to any financial institution or political organization. The power is in the user's hand, so you don't have to worry about things like fiscal policy or recessions affecting currencies.
Cryptocurrencies can serve as an efficient alternative to cash (which can depreciate over time due to inflation). create erc20 token
Security: Every cryptocurrency transaction is recorded on the blockchain, allowing the history of, for example, Bitcoins to be traced.
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