Just sell some bitcoin and pay the taxes in cash, problem solved.You only need to pay taxes once a year so its no big deal.
is a problem. theres a reason people are not converting all of their liquid assets to gold. price of gold changes more than taxes owed.
and its inconvenient to do this.
ask yourself this, would you work for japanese yen, while living in america? how about other things of value? used dvd's? you could just sell them just like you do BTC.
No its not a problem since converting btc to usd is easy. People aren't converting all their liquid assets to gold because gold is difficult to sell and a hassle to sell. BTC->USD is way easier to exchange. You do it all over your computer. Compared to selling gold where you have to find a buyer, go to their house and get the money. Major pain.
and yes I would work for Yen if I had to (ie. required condition to have the job). Also yes, I would work for other things of value if required by my job. I've worked jobs where I was paid in silver. Had no problem doing it.
also used dvd idea is not too realistic since used dvds are a pain in the ass to sell.
Like I said, btc is easy to convert to USD. All the other items you listed are not easy to sell for usd.