Money transfers across borders. I have friends who live internationally and crypto has become our defacto way to transfer money.
But frankly, your presentation of the question leaves me doubtful you are looking for a meaningful answer here. The reality, as others have pointed out, is that there are lots of platforms in the space offering plenty of compelling services. You personally may not desire those services, but that doesn't change their viability.
If I was presenting the question more completely, I would have included financial fraud alongside speculation/gambling, which is exactly what you're doing by sending $ across borders without AML/Forex regulatory checks on the txn.
But frankly, your presentation of the question leaves me doubtful you are looking for a meaningful answer here. The reality, as others have pointed out, is that there are lots of platforms in the space offering plenty of compelling services. You personally may not desire those services, but that doesn't change their viability.