I assume that investing without knowing of a particular asset is a wrong approach. Moreover I am sure that such an approach will devastate the own pockets quite fast. The theory of investing enacts us to be more serious when investing. Let us take an example. Suppose, you want to have a shower you take a towel with you but not a wool socks because you know exactly what a towel is and for what purposes it is utilized as well as financial assets you should know well enough. In particular the market situation which is enacting in the current moment of time is a little bit difficult and unstable so it need to be even more careful than usually.