Cryptocurrency is decentralized digital money based on blockchain technology. To be more specific, you are probably familiar with bitcoin and etherium. But in general, there are more than 5,000 different coins now. Many countries already accept bitcoins, which means you can pay for goods or services with them. But a lot of people are just investing in them. For example, to buy cryptocurrency you can use exchanges or brokers
https://j2tx.com/. The buying process is very simple, but at any site where you want to buy coins, you will need to confirm your account, in most cases it is very fast.