Because the other cryptocurrencies are actually shitcoins and scams.

I know that this statement is bold and makes people angry especially in the first world, but using the financial system as reference there are many reports out there of funds explaining why Bitcoin is the only “crypto” that will outlive, and that Proof Of Stake is basically and oligarchy scam system. So using a slang, this is not anymore a “trust me bro” argumentation.