But then he can sell them back ? not impossible to move a price and make it worth it, they do this with options expiry and try to make the largest number of punters lose the most money. They profit from expired unused options and yet still own the original commodity which can be dealt back into market fairly easily as the parties involved are primary market makers. Possibly btc has less volume for these kinds of tricks
Yes he could, then it's slippage incurred moving the market vs payoff on bet. It might work, but in a market as volatile as BTC it's a hug risk. If you are the single person that moved the market 250fold then can you be sure that you are going to have enough buyers at sufficient bid to offload back to market?
I'd want a much bigger return on the wager, or I'd need to be in a position where I was quite happy to keep all the btc bought and be prepared to prop the price up until it found natural market support (which could be hella expensive) so I'd need to have billions in play money.
I'd need to be a bank, or the fed
