Crypto can also be regulated and it probably will get regulated.
Regulation always comes after the fact. The history of the "modern" banking system is that merchants at some point got bored getting robbed of their gold while traveling from A to B. Also, moving around tonnes of gold is actually expensive and tedious. So, they started sending each other bank notes underwritten by bankers who kept the gold in their vaults. Out of that modern banking and eventually central banks emerged. The notion of keeping gold in a vault became optional some time later. The regulation we have resulted from robbery getting more sophisticated. Initially all of this was unregulated. Regulation just happened as a reaction to all the inevitable bad stuff that happened.
What's a bank: a ledger of value denominated in currencies and a promise to account those ledgers correctly. Why do banks need regulation? Because ledgers are manipulated by people that can and will cheat if they can get away with it.
What's a blockchain: a tamper proof, shared ledger. If that sounds like a useful tool to have in a bank that would be because it is. You need a bit less regulation to keep the ledger correct. But you still need some regulation to ensure bankers use them properly and appropriately. Technology doesn't fix their tendencies to not do that.
Using an unregulated blockchain is not a whole lot different from using bank accounts in dodgy jurisdictions to evade taxes and oversight. Popular with the same types of people for the same types of reasons.