From now on I think I will only use exchanges that are on the top 50 or 100 by volume... or if you have other suggestions/filters when choosing an exchange?
I don't know why some people prefers to use exchanges that cannot be trusted even the top 50 or 100 you are talking about is still very risky, why not go for the top 10 exchanges. And just like what Orpichukwu said, all exchanges cannot be trusted, so except you want to trade your coin then you can send your crypto to an exchange otherwise it is more secured to keep your cryptos is self custody wallets.