If they solve the anonymity problem (such that they can replace paper currency, which can also be entirely anonymous), then I'd expect that you could buy anything you want with it.
Subject to anti-money-laundering rules, of course, which usually apply to larger transactions.
> it won't triple in value in one year
That doesn't have much to do with the currency, but with the market, and volatility works both ways.
If they solve the anonymity problem (such that they can replace paper currency, which can also be entirely anonymous), then I'd expect that you could buy anything you want with it.
Subject to anti-money-laundering rules, of course, which usually apply to larger transactions.
> it won't triple in value in one year
That doesn't have much to do with the currency, but with the market, and volatility works both ways.