Of course the btc market as a whole now is worth alot more, so that must be factored in.
Shares are BTC denominated, as is potential mining revenue.
Rareness costs, bitcoiners know that.
Bitcoiners who have been around for longer know that "rareness" is irrelevant, and return is all that matters. Or do you still fancy a piece in a rare Cypriotic bitcoin banking venture? Perhaps a rare bitcoin real estate company? A unique bitcoin insurance company?
BTW, you could invest in Cointerra too. And Im pretty sure some people here invested in other asic vendors, like bitmine and bitfury. Not btc denominated, and not publicly traded, but investments nonetheless.