To anyone thinking of shortselling (I have no idea if BTC shortselling is the same as stocks, but it should be).
Bitcoin goes to 0: you double your initial investment
Bitcoin doubles from where you shorted: you loose 100% of your intial investment
Bitcoin quadruples from where you shorted: you loose 300% of your initial investment (EDITED)
Bitcoin goes up 10x from where you shorted: you loose 900% of your initial investment
and so on and so forth.
YOU CAN LOSE A LOT MORE THAN YOU PLUNKED DOWN. WORTH IT TO SHORT? PROBABLY NO, EVEN IF YOU CAN BE DARNED SURE THAT HISTORY WILL PROVE THAT THESE THINGS ARE STRING CHEESE EQUIVALENTS.
