Cryptocurrencies are based on blockchain. It is a system that records transactions over a computer network. The chain of blocks with files and databases is stored on different computers with the same rights. That is, they do without a server, and the absence of the main administrator makes the blockchain almost invulnerable to hacking.

So far, no one has been able to calculate and penetrate into each copy, and the rest of the participants do not agree with changes in one block. This reduces the efforts of the hacker to zero.

Blockchain allows cryptocurrency to be decentralized, which means that no single institution, such as the government, central bank, or tax office, can control it.

In essence, blockchain is a digital ledger. It can be represented literally as a chain of virtual data blocks. Each block stores the date, time, amount, and information about who was part of the transaction.

To distinguish between blocks, each has an identifier known as a hash. And since any block in the chain can easily contain a significant amount of information, it can contain several transactions.

Blockchain is the foundation of Bitcoin and other electronic coins. Bitcoin has been the leader among cryptocurrencies for many years. And now it is much easier to buy bitcoin. Here https://www.bestchange.com/visa-mastercard-usd-to-bitcoin.html you can explore the offers of exchangers for buy bitcoin with debit card and choose