4 years ago, I trade on poloniex and bittrex , they are the most trustable exchange I've ever known.
I can withdraw anytime without KYC verification. For some reason , I stop trading over 2 years and I want to withdraw the rest of the balance left, they asking me to give them the KYC.

Maybe the different between you and me is you're still new and still not aware that most exchange nowadays require KYC