yes u are right on BTC, we can see , but dash, litecoin, eth, etc ? u can say when up and down ? i mean many traders can, i know, and some who knows trading a little, but somebody like me, or some that even don't know what is Bitcoin but want to win some money ? Ok whith difficulty rising, contracts for 2 years on others can be "dangerous" if price falling ( for example ETH) and PoS/Pow, sure, u are right, but now that "things" will be better for me (that's my opinion), after Agust 1st, can be very profitable to have this working on a lifetime contract ;) . Have a good day !