Bitcoin is not an instrument offered by a company but more like a commodity, like oil or gold. Similarly people can falsely advertise gold or oil as very good i

Bitcoin is not an instrument offered by a company but more like a commodity, like oil or gold. Similarly people can falsely advertise gold or oil as very good investments, and they can crash. In mainstream media there have been lots of warnings about Bitcoin. For example various central banks have been issuing warnings regularly since the early years of Bitcoin. I wouldn't compare Bitcoin at all to something like the Madoff ponzi scheme. Is it totally different in a sense there are lots of information with various approaches. In addition to the promoters there have been always lots of critics and sceptics.