Having bitcoin classified as property rather than currency is the best possible scenario. The capital gains tax rate is 0% for most people. 0%... hard to beat that.
Only for long term capital gains. Short term capital gains (asset held 364 or less days) is taxed at your regular income rate.
Which I suspect will lead to less "short term" speculation in Bitcoin...which is perhaps likely to tend towards being better for Bitcoin in the "long term"?