You also can't pay taxes with US$ in most countries outside the US. They only accept local currency. The IRS not accepting cryptocurrencies is irrelevant; you

You also can't pay taxes with US$ in most countries outside the US. They only accept local currency. The IRS not accepting cryptocurrencies is irrelevant; you can take a look at any trading platform and find that there are people, right now, willing to part with more than 49000 of their "government backed US dollars with their intrinsic value and ability to pay taxes" to acquire a single bitcoin.