Twitter has all of the "smart people" and "money" on it, unlike Reddit, TikTok, Facebook, Instagram, etc.
Billionaires are tweeting each other in the open. Politicians. Reporters. CEOs, CFOs.
No other social network is like that. It's the only thing keeping Twitter relevant.
TikTok and Instagram have their celebrities and trend setters (which is where the ad dollars are), but you don't see anyone musing about "metaverse", "web3", and what their latest fund is going to pursue, geopolitics, OSINT, stocks, etc.