Bitcoin is crashing because normal people can't obtain BTC beyond gambling with their hard earned fiat money. People that buy BTC are most of the time already FIAT wealthy, so this doesn't help as we need 99% acceptance. The 99% don't buy gold, which is the use that most bitcoin buyers are giving to BTC, a sort of an electronic asset, not a currency.
Usually gold is transferred as an electronic currency as well. When is the last time you have "bought gold" and received any in the mail, coins aside?