Their are many crypto currencies like Bitcoin Ether Binance Tether and Dogecoin. There are different types like
DeFi, NFT, store of value tokens like bitcoin and litecoin, utility tokens, and yield farming tokens Aave
Im sure that there are many more than 4 types of cryptocurrency. I, too, only recently learned that in addition to bitcoins and altcoins, there are many other crypto coins and that many of them are now growing in price. For example, I read a review by one crypto trader that now is a good time to buy dash coins. I don't have a lot of money to invest in it, so I get dash through online games here https://duckdice.io/dice/dash-dash . I hope that soon I will be able to sell this cryptocurrency at a high price.