I'm really surprised to see such calculations from a Legendary person. I believe you just misleading newbies, because you should be well aware that the statement
buying a contract you thing the bitcoin price will rise the same or more as the bitcoin mining difficulty.
is wrong. If you make such assumption, it may happen (and likely will) that holding bitcoin would be more profitable than mining it.
Hi! Maybe my message is lost in translation.
, buying a contract you counting on the bitcoin price will rise the same or more as the bitcoin mining difficulty.
This Difficulty rise can overtake the bitcoin-price growth overtime.