I have tried to sell tokens in the past which resulted in losing all that I had, I need more advice on best Exchanges for mostly all altcoins and how safer they are to use?
I'm so sorry to hear that. but how can you lose all of your coin ? does the exchange doing scam ? to be honest In my opinion I can guarantee which exchange are safest. because if you ever hear MTGOX adn BTC-e case, who can Predicted if they all become scammer ? because in that time they all the best exchange. so I suggest you to don't store all of your coin In centralized exchange. just sent them if you want so sell. it's better to store your coin on NANO LEDGER or wallet who have a private key.