Long term capital gains tax brackets [US]

[suppersz]

So in the US, it seems that if you are in the 10% or 15% tax brackets, long term capital gains are 0%. So if I am a daytrader and want to cash out $37k or less in a year (qualifies for 15% bracket), I can do so with 0% tax on the btc I sell, right? Is this too good to be true or would work fine?