Digital accounting and limited edition digital commodities are trivial and uninteresting by comparison.
An anonymous digital commodity is clearly not trivial. Gold is very trivial however. And you should hold a little physical gold for security. Something tells me you prefer a fiat currency instead.
Do you honestly think the US government is going to allow a significant number of retailers to accept bitcoins? How, exactly, do you ensure compliance with tax laws when people are spending bitcoins? You don't. And the IRS isn't going to be understanding about that.