Sure, but if you use coinbase you’re locked it. And in some cases unless you produce an ID you can’t even get the money out. Pretty weird you can dump as much money in as you want but getting it out isn’t as easy.
That's the biggest problem with crypto exchanges. They need to be brought under the same rules as other broker/dealers. The Know Your Customer rules are applied when you open the account, not when you withdraw.
Fails to process a withdrawal within specified time limits gets a broker in serious trouble. Institutional clients stop dealing with you within hours. See Drexel Burnam Lambert for an example. Then FINRA lands on you.