The forums you mentioned, like Altcointalks, Bitcointalk, Bitcoingarden, and Cryptalk, are indeed part of the broader online ecosystem, but they are typically classified differently from mainstream social media platforms like Twitter, Facebook, Instagram, and YouTube.In essence, while crypto forums are indeed social platforms in the sense that they facilitate interaction and community building, they are often categorized separately due to their focus on specific topics (crypto and blockchain) and the nature of their user base. They serve more as specialized discussion forums rather than broad social networks, which is why they may not be as prominently mentioned in discussions about social media platforms.