1)A vault or bank kinda feature where yoy can store coins (they will deduct from main account)and then you can withdraw them later like stake or wolfbet has.
2)Add Trc-20 usdt as well apart from erc-20 we have cause ethereum transaction fees are fucking too high and trc-20 is cheap,also all makorexchanges support both usdt types so liquidity won't be a problem.