Cause crypto is mostly used for illegal transactions, like drugs. There's literally no other use for crypto currencies(btc) seeing that it's slow with extremely high fees.

This and I've given up on the idea of cryptos as currencies of the future, due to quantum computing. If your coins are stolen because the blockchain is broken into(a extremely real and soonish event), you can't do anything about it and they're lost forever. With a bank or physical commodities(gold, platinum for ex), at least you have insurance and/or a physical item(that can't be hacked), and can get your money back