Those who are concerned about this issue should care about the safety of their assets. For those who care about asset safety, there is really no need to ask this question. If you want your funds to be safe, just trade on mainstream exchanges like ZB.com, Binance, coinbase, bitfinex, and bitmex. If mainstream exchanges are not safe anymore, the security of the entire industry is at stake. If the token you want to buy is not listed on mainstream exchanges, what you should worry about is not whether the exchange is safe, but whether the coin will return to zero.