However it is also insanely risky. There is no law that states that Bitcoin will keep going up. In fact, it will go in the direction that will benefit the people who are already rich the most. If price outstrips adoption, price rises will not be exponential for a while.
I dont think it is so risky as you say. It is true you may sell for less than you bought, it really only matters on supply/demand, but as long as Bitcoin is usefull payment method, the price wont crash under 1 USD, this Im sure