In a non-fiat system why would you need to?
But seriously, in the current world, if we have a half-billion dollars "worth" of legitimate (or laundered) cryptocurrency, what can you do with it in the real world, especially contrasted to what we can do easily if we have a $$half-billion in legit $, €, £, or ¥ deposits?
I don't think we could even buy a Tesla or a pizza anymore. Maybe some things on Craigslist that take crypto?