In other words: Bitcoin is mostly good for illegal transactions.
Good old fashioned cash is much better for criminal activity.
A crypto like Zcash (another fairly large crypto) that utilizes zk snarks to encrypt transactions and then decouple coins from their history would be much better suited for illegal transactions.
BTC was always about reducing control from a few centralized parties. I don't want my bank or paypal account being arbitrarily frozen.
Nowadays BTC is not very good at transactions due to exorbitant fees + very slow confirmation times, but things like ethereum, bitcoin cash, and altcoins offer options. ETH is very quick.