If it was all short term capital gains, then yes, but he would still have realized gains way over what the tax bill is. That wasn't specified in the post though

If it was all short term capital gains, then yes, but he would still have realized gains way over what the tax bill is. That wasn't specified in the post though. Usually capital gains refer to something that's taxed at a lower rate for assets held for more than 1 year, 15% (or 20% if you're in a higher bracket) How tax/financial-illiterate do you have to be to pour ALL of your realized gains back into altcoins going into the next year?