I think that depends on where the person plans to sell their bitcoin in the near future.

If I were planning to sell and I expected my returned to be more than 6%, I might use a line of credit to pay taxes. Id probably calculate the tax burden on the sale of bitcoin as well, to make sure it’s really better to hold.

But, seeing as how I don’t plan to ever sell, I’d definitely pay on credit and try to learn from my mistake going forward.