How does that make any sense. If I don't think mining is worth it now how is it relevant if BTC goes up to $10,000 a coin. If not going to ROI in BTC I would be better off just buying the BTC directly and letting it go to $10,000 a coin than investing in mining and getting less BTC when it goes to $10,000 BTC.
What you're suggesting is to buy a $5 shovel that will get you $4 worth of dirt today then when dirt doubles I have $8 and made money, but why not just buy $5 worth of dirt today to start and have $10 later.
You are forgetting that many people don't have US$ to lend to others, but they have a unused BTC and don't want to take the risk of shorting them themselves. It's unimportant if you and other people help drive the BTC price to $200 in the short run, if in a long run you get more BTC then you initially started with. The preposition is that BTC will be one day worth tens of thousands of dollars or even more, and the only important thing is how many BTC you will have in that moment, it's unimportant if that moment will be in the year 2015, 2016, or 2020. Smart game strategy is to increase your BTC stack even if that means price goes temporarily to $10, as long as you believe that it is just temporary. IMHO it's much more logical the opposite of you are proposing, if you have BTC lend them to others so they can take the risk and short them, if you have US$ don't lend them buy new BTC stack instead.