>If your argument is that I'd have to convert bitcoin to dollars in order to pay taxes, that's a nonargument.

It's not a 'nonargument'. It's true, and very relevant.

>I am sure they would take Bitcoin directly if pressed.

That's speculation. You have no reason to believe they'd accept bitcoin. As of right now, they do not. That's all we have to go on.

>Just ask the FBI, who is now in possession of the largest bitcoin cache on the planet... I suppose you think they're just going to erase all of them because, you know, they're not "backed" by anything?

Is there a reason for making this absurd strawman? Where has anyone ever suggested that people should erase their bitcoins because they're not backed by anything?