I learned the other day that Christianity is atleast 6 centuries older than Islam. So I know you can start new ones. Like L Ron Hubbard and scientology. Is the trick just getting enough people to listen to me ? Like I can start an online religion? And I stay anonymous? Then they buy me mansion and treat me like a king and spread my word? Is that kinda how it starts?
Historically, the size of a group determined if a cult had progressed to a religion or not. So all religions were born of cults. I think it was only in recent years that language changed and now anything can be a religion. so you can have your very own religion if you want. so to answer your question = yes.