of course, you need to point out that Crypto has ended up being indistinguishable from the banking system in all the important parts.

The distinguishing parts are things you don't want: easily corrupted, grifted, cheated and otherwise duped.

I tried to use Coinbase a few months ago to pay for something, and I couldn't even make a transaction because it was deemed suspicious, and my account got locked or something.

Someone with a lot of cryptocurrency in Coinbase is also quite likely (at least relative to the average person) to have lots of on-chain cryptocurrency, too, though.