Common quote from Robin Jones Gunn, you may or may not have heard about it, but is "You go alone, you go fast, you go with people, you go far". Have you met anyone who knows about bitcoins, and then you tried to introduce them to this forum to come join this community, but they refused? I like to see what maybe their reasons where.
I am just over relating that quote to bitcoins; do you have the opinion that lone investors who are not members of any kind of forum or community about bitcoins or cryptocurrency can still be very successful investors?
I would say that membership in a forum or community should not be associated with investing. The forum and community are primarily platforms for communication and whose participants are not always successful investors. If you read various topics on the bitcointalkl, you will see many stories about unsuccessful investments. However, being isolated from such communities doesn't mean that lone investors will not be successful just because they don't draw information from such sources of knowledge. Such investors can use other resources (source of knowledge), such as literature and other things, for example, related to the world of traditional finance (stock markets) and learn from there.
A striking example is Tim Draper. Assuming he is the lone investor (he is unlikely to participate in discussions on this forum) that you are talking about, then try calling him not successful in investing. Remember how many bitcoin he has?