You CAN'T withdrow from Hitbtc, because it's futures they are selling.   They will allow to withdraw only after WTT will start trading on exchanges, and there will be blockchain for it.  This won't happen till 2018 I assume.   Another thing is that you can't 100% trust hitbtc, because it has no transperent owners.  If they disappear some day, you will loose all tokens.  It's much safer to rent.