They won't let their peasants have crumbs. They did it on Robinhood and other exchanges. They'll pull all the stops to prevent you from cashing out when GME hits 42,069. How? Internet blackout? Bribes/Blackmail of exchange owners? A "hack" such as with the meat processor and the oil pipeline?
Why? Because when they go down they'll want to take you down with them. No bigger "fuck you" when you see your stocks collapse as the bubble pops, unable to withdrawal.
If you're in, assume you're locked in and all the money you put is gone. (It's not even real money to begin with.)
Just a warning.