You could see it being taxed less? I think you're dreaming. Bitcoin is a capital asset, taxed just like any other one. There will not be any special carve outs for bitcoin. Taxed like stocks, gold, real estate, and every other capital asset... standard capital gains rates. If you think otherwise, you're just fantasizing.
As for an incentive to sell bitcoin, absolutely. You should be doing this every year. In the United States, depending on your filing status, you can claim about $50,000 worth of long term capital gains at 0%. So it makes a lot of sense to sell and rebuy back enough bitcoin to realize 50 grand in long term capital gains every year.
This will reset your cost basis up to the current price, saving your 50 grand in taxes per year and costing you nothing.