If you want to raise the bet to a few billion dollars I'll happily take you on. But that's just a question of scale - if you have a rando-blockchain you use fo

If you want to raise the bet to a few billion dollars I'll happily take you on. But that's just a question of scale - if you have a rando-blockchain you use for immutability internally then how trivial would it be for me to spin up five servers to outhash you and rewrite history?