You can buy and sell DGTX tokens on exchanges right now (https://mercatox.com/exchange/DGTX/ETH). 'Cashing out' is easy. But unlike other exchanges, there will be no deposit or withdrawal fees (just mining fees that do not go to us), and no taker or maker fees. So your profits are your profits.
It's also important to realise that the Digitex Futures Exchange is a futures exchange. The whole point of this is that you can trade futures prices without needing to own the commodity itself.
You never read the website where it explained in detail our timeline. Q2 and Q3 were always going to be dedicated to getting the token listed on other exchanges.