Actually, if you have WTT token then you can earn LTC, DASH, BTC, and ETH. But, it would take time to get your ROI.
Maybe. What you earn depends on who needs to rent WTT and what they are mining. The WTT I rent earn me some of each of those, but what coins and how much of those coins I earn varies from day to day. It used to be that Bitcoin was the most prevalent, but recently I have been earning more Dash. ETH has dropped off quite a bit