I agree with Binance at the moment here. I think it is always a good idea to trade on the biggest which is Binance at the present,,, but to always keep an eye out for the status of others. Like investment, I try not to trade at only 1 place, you just never know what can happen and if at least one exchange closes, you have still others to trade at.

Support speed is extremely important for me, also. In case of problems, you do not want to wait for weeks.