What backup scheme are you using on your MySQL database? What uptime can you guarantee? How do you handle the security? Who has access to it?

Speaking as a software architect, your MySQL database seems like a terrible solution.

Yeah, you still need to pay for the link with the 'old' system of course. And besides, the exchange fees are nothing compared to the huge gains :p.

Is crypto a better solution now? Sometimes. Is it a better solution overall? yes.