So you are a Big Fish. You have a boatload of money in exchange X. You go to take it out and they don't immediately give it to you. They say, "Listen, we can't get to it, it's in our cold wallets, it will take a week." A week goes by, they say, "Listen, here's 10% of what you asked for, we'll get you the rest shortly.". This goes on, they periodically give you some of the money but there's a lot of evasion.

What's the Big Fish to do?

a) Quietly keep pressure on the exchange, taking the money as it comes, while not putting any back into the exchange.

b) Make a big stink, bring in lawyers, write press releases and bring down the exchange, possibly destroying any opportunity of getting the money back.