OP needs to learn, holding bitcoin is tax rate of ZERO. but holding fiat in his personal account after selling the bitcoin. he needs to pay tax on that fiat gain.

but i do agree people are silly when it comes to saying "bitcoin is doomed" and here is why

1. people will find other ways to not need FIAT, thus not needing to claim FIAT gains
2. the IRS wont care about useless / worthless items. IRS have categorized bitcoin, thus it has proven bitcoin to be a valid store of wealth.