US dollar is also used in many criminal activities. Does it have negative reputations?
BTC is used 90% by the "black markets"(which includes HYIPs aka "Forex") . Without them, BTC would not exist or its value would be almost zero.
That's not true at all. 80-90% of the drugs are still sold for dollars or euros. HYIPs are very different than Forex and by the way, the biggest fraud we are seeing right now (at least the smart people are seeing) is happening on Wall Street with the help of FED, they all use dollars.
O did I mention that with the help of the dollar, US government is funding a lot of wars and killing a lot of people?