Is it just that there's extra paperwork or verification or something? Or is it because they think you've done something illegal?
i think it is mainly about legality of it. mostly because bitcoin is not exactly 100% traceable and there is always money laundering issues and stuff like that. and i don't think it will be relaxed any time soon
So if I wanted to sell $1,000,000 worth of bitcoin I could do it, but I'd have to leave it on coinbase or wherever (which I wouldn't want to do) and the problem is just the conversion of it, right?
i believe the deposit and withdrawals of these exchanges is based on equal value of their limit not just in fiat. for example if it is $10k per week it is also equal amount in bitcoin per week (meaning 1.36
BTC per week). i am not sure how coinbase limit works though.
So,if I thought a crash was imminent what are other options, converting BTC to USDT?
no, that is going from bad to worse. USDT is centralized and it all depends on the company that is backing it. if some day that company which is also backing bitfinex goes under (like when Bitfinex was hacked and everyone was worried) USDT will crash hard (as it did before after bfx hack).