Indeed, this is one of my primary points as well. I've been trying to tell people like Max Keiser that for all its good, BTC is not anonymous, which is one of the primary functions of cash. The totalitarian surveillance society would love to track everyone's purchases.
On top of that, the other problem is that in a fiat fractional reserve system, there's not much stopping the big central bankers from poofing some old currency into existence so they can buy up lots of BTC et al.
That's why right now I am leaning towards Monero and similar at least semi-anonymous coins (without having to use a tumbler separate).