Our bank accounts are also identified by mere bits. What's that quote...
> Cosmo: The world isn't run by weapons anymore, or energy, or money. It's run by little ones and zeroes, little bits of data. It's all just electrons.
(To be clear, I'm extremely ambivalent about cryptos, so I don't entirely disagree with your sentiment. I can see the "it's a new form of currency" side, and I can see the "mass delusion and speculation bubble" side. History will prove someone right, but I don't know how to estimate a probability of any one cryptocurrency winning, if any do.)
Bitcoin is, according to group:
IRS/tax offices around the world: a commodity (and thus taxed like stocks)
Banks: neither (and don't you dare touch it !)
Most historical bitcoin currency guys (e.g. Steam): neither (this unfortunately seems to exclude pretty much all the bigger ones)
Some remaining guys[1]: currency
Believers: currency
[1] https://99bitcoins.com/who-accepts-bitcoins-payment-companie...
Biggest. Pyramid. Scheme. Ever.
EDIT:
Buffet: Crypto currencies will come to a bad ending. ... "tulips" ...
Munger: I think worse about crypto currencies than you do. ... "trading turds" ...