in my opinion binance is the best exchange at the moment. but lately binance seems to have a problem with its security system, but it looks like the management of the binance will not stay silent because there is obviously a large velocity of money there. I'm also sure they will find a solution, I'm still sure with binance, binance won't be that easy to go bankrupt. but if you are not sure about binance, maybe you can try
KRAKEN, BITFINEX, COINBASE