It has been a question for many years because of its anonymity. The only reason why many people engage with this kind of crypto especially bitcoin because of its potential not only of its ability to grow or go up but it's also ability to give profit to many investors. As I read many articles here a lot people became rich because of bitcoin. And as time goes by bitcoin is slowly conquering the world by replacing fiat as a means of transaction. So bitcoin grows that much and that is the reason why people continually invest with bitcoin.