The fact is you did not short anything but you bought a put option.
Even if I agree with you on bitcoin having an intrinsic value less than that of toilet paper, these reasons would have been true before the recent high point too. Instead, it reached that high point and an equivalent put would have expired worthless. Meaning you would have lost all of your investment.
I think shorting is a better idea as it relies less on timing. But with the fed pumping massive amounts of money into the us economy, I think you are still not unlikely to get margin called for a bet that the fed will not destroy the value of the dollar faster than the bitcoin goes back where it came from.