It depends on what crypto it is.

However, if you want to get into it, you need to look into Bitcoin and study it. It has a fixed supply of 21 million (2.1 quadrillion Satoshis to put it in perspective, where 1 BTC = 100 million Satoshis). It’s a hard asset that’s essentially been around since 2008.

There are others such as Monero, which are good as your spending currencies, but some people tend to use Bitcoin Cash (BCH) as spending money too.

Those who say cryptocurrency is a scam don’t really understand how Bitcoin is supposed to work. Apparently, people have said that BTC was a testnet for Monero, considering BTC’s pseudonymous nature.