BTW, if you spent $250 at the beginning of 2013, bought 20 btc and held 'them, you ARE that rich bastard that "needs" to be taxed 43.4%+state tax. It sucks to be Mr/Ms smarty pants.
The "surprise" will be that the revenue would be affected negatively since people would not sell. Therefore, they would need to come up with Act II and straight tax wealth, not cap gains. Why? See below.