If BTC price heads south from 500, it means that the adoption has turned negative.
So not only all the initiatives that have been built this year with the funds generated by 2013 rallies, and the VC money, and the Wall Street initiatives, will turn out to be worth nothing, but also the internal growth in userbase that has averaged 0.6% per day since the start of 2010, will not only revert to zero, but also turn negative, with people who have used Bitcoin, ceasing the use and turning back to PayPal, en masse.
Sure. Believing in unicorns never made me rich in the first place.