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?
No I haven't met any this kind of investors. I have know many successful bitcoin or crypto investors who are doing successfully trading without involving in this bitcoin talk community , from of them many have heard the name of bitcointalk and many of them didn't heard the name of this community. And I think it is also doesn't any matter to doing trading, trading requires fundamental and technical analysis skills and if those are have in a person I think he don't need community for doing successful trade .
But for acquiring those knowledge and skills person or trader should have a proper community for a proper guide line and there is not necessary that it should be bitcointalk forum it can be any community where the knowledgeable person ready to give you proper guide lines for making trading skills.