John Mcaffee, the man behind Mcaffee antivirus and now crypto bull, was arrested for his promotion of ICOs (initial coin offerings) in 2016 and 2017. As you may remember, most of the ICOs were cash grabs and those coins have since disappeared. The Defi craze of today is often compared to the ICOs of 2016-2017. In addition to this, SEC has been brackish down on exchanges recently.