Thank you both for the answer
Just want to give you a real fact here, we can't say that an exchange is safe even it is licensed. Look at your view on BTC-e, a trusted exchanges but now turned into shitty one.
BTC-e was unregistered and failed to complain to fincen rules...
to avoid the same situation, I was looking for an exchange that is solid and legit under registrations and money transmitting rules.
To answer the topic title, I suggest using Poloniex. As usual even in other exchanges, no need to do verification to start trading but you will have a withdrawal limit. The volume here is pretty nice compate to other exchanges and never did a problem using this exchange until now.
i'm looking in to Poloniex, Kraken, and Bittrex right now.
They do not seem particularly open about they financial details or registration...
or, at least, I'm failing to find specific info about that.