You didn't include enough options IMO. The real reason is because this insanely high price wasn't even close to warranted in the first place. There are gov crackdowns going on, private company crackdowns, alt coin competition, transaction/scalability issues, etc... I won't be the least bit surprised if bitcoin's value is $0 in a few years. This bitcoin price hit is different from all others in the past, and I've been following this since mid 2013.