I was thinking something more stable than "buy for X and sell for X/10". Probably something not controlled by Roblox at all (USDC or DAI?). That would be giving up a lot of control, but it would solve the problems they're giving the kiddos.
Yeah Roblox doesn't want that. They want to be able to take a cut every chance they get and also to encourage people to just keep their money in Roblox to keep it moving through purchases so they can keep taking 75% cuts instead of the /only/ 65% they taken when someone cashes out.