If you get contacted from someone claiming they need your help to withdraw a few bitcoins and ask you to register on the site, don't do it. Once you register in ortder to withdraw the bitcoin which probably don't exist you will be prompted to deposit some bitcoin to this address because you need to get verified. I personally haven't tried it but this is for sure a scam. The website claims to be from 2013 which is funny because I could not even go to the trading with does imaginary bitcoins the user sent me. Not to mention the misspelling the site has. You can't see the address existence of your bitcoin the user sent you to withdraw. All in all just another scam.