I've skimmed through Bitcoin article on RationalWiki and phrases like

"The use case of the currency is purchasing illicit goods (e.g., drugs and stolen data on darknet marketsWikipedia's W.svg) and darknet scams (e.g., murder-for-hire)[10][11] and extortion (e.g., "ransomware", for which it is the currency of choice[12]).[13]"

make me doubtful.