I did not take a course, I only saw videos and read a lot in investopedia ... But I saw videos about the basic operation of bitcoin and what were its strengths and weaknesses and whether it was good investment or not. I did not go deep in the technical aspect. I believe the following:

A good project is one that offers solutions to the real world. something that can help make life easier for people.

There are many altcoins, but most of these altcoins do not play a relevant role in the real world. For this reason they are only used only to make trade on exchange  and only increase prices due to pump and dump