I don’t think Epic has to do anything about it.
It’s not hard to support any crypto transactions in your game.
Better-yet, it’s very easy and also much more secure to just integrate a service or a wallet software.
Even better to not integrate anything and just use transaction confirmation data (which is public) to process in-game stuff.
Tl; dr: if you’re good developer and you know what you’re doing, it won’t be a problem to you.
If not, better to not mess with it at all.