Why put yourself in a position where you need to worry about that happening? Keep the bulk of your BTC in a private wallet under your exclusive control and onl

Why put yourself in a position where you need to worry about that happening? Keep the bulk of your BTC in a private wallet under your exclusive control and only use the intermediary provided wallet when you need to make a trade through their platform/exchange. You're still exposed while a trade is being executed but your maximum exposure is never more than the amount you are trading at that time. You wouldn't deposit your life's savings with a new, unknown bank based out of a tiny island state with lax/non-existent regulation. Don't do the same with your BTC.