Which wallet do you use for storing your ERC-20 token?
I personally like MEW because it's very easy to use. Some people like Trezor or Ledger but personally I have no problems by using MEW

In MEW you have complete access to your private keys.
I guess I affect my traits, but to trust 3rd parties your wallet... I think it's a pretty stupid idea. Buy offline wallet and keep your coins on it. As for me, the easiest and most convenient way, and all safety in your hands.