I have heard the warnings, not to leave coins in an exchange. So far I have lost 50,000 dentacoin by leaving it on Cryptopia, I have sent them a support ticket and see what they have to say.
I have a Bittrex account but their validation email does not work so I can't use it.
I have a coinsmarkets account, no access to my coins right now, upgrading the servers.
But I have a binance and coinexchange.io account as well. I trust them but I hear never to leave money out of a wallet. But I have dozens, maybe even hundreds of coins. If I had to download a wallet for each coin I have it would be so much work.
And my main question is this...what about user error, or wallet error? Downloading a wallet as fast as possible, without researching it very long, I am prone to make a mistake. Some of these newer wallets you never even recieve your coins and they have errors. So is the chance of losing my coins due to wallet error, higher or lower than losing my coins due to exchanges screwing me over?
you can try to compbine some wallet just like eidoo for erc20 specialist wallet and coinomi or jaxx that gives ability for you to manage your private key too, exodus offers similar service with jaxx and coinomi. binance is only the trusted exchange site right now. before you are using wallet and then you must try to back up it in your harddrive maybe.