I could be wrong, but the way I see it, the U.S. government can't tax you until you trade for U.S. dollars, and even then, you have to report it, unless your watched or have large sums of money your trading, I wouldn't worry bout it. It's just like the lottery, oh I won 100 bucks..your suppose to report that on your taxes...or if you sell something off craigslist, same..but oops forgot. Nice post! followed! check me out here:
https://steemit.com/filmmaker/@larutanton/starman-episode-001-commentary-by-larutanton