Without speculation, do anyone knows?
Do you know the reason why it hit $1000 this year?I think the reason is more or less same.
Bitcoin is a volatile and just one good positive thing trigger its price up and one negative and price crashed like nothing.
This piece of article from businessinsider sums up the bitcoin rise in 2013 very well.
" Interest and buzz is absolutely
exploding, as people see a
combination of a surging
market, an alternative to
traditional currency, and a fun
speculation."