My trust comes from observation over the years. I confess I was into alts a LOT when I was new in crypto, I actually believed all the crap these projects were saying. I even paid money to invest in projects, and believed in building interoperable chains, utility tokens that would save the world with all the things you can think of in all the industries you can make up.
But Bitcoin stayed true to what it did best, which was to provide a means of sending money to anyone, for anyone. I really don't care that media and people attack this utility. Bitcoin has always been the one thing I can trust to send money. Yes sometimes high fees, but I know how to make sure I pay enough. But never network down, never network not accessible, never network blocked. Even ETH cannot say this.
I'm not joking when someone asks me which is the most reliable network to send money with the highest certainty. It's not even bank transfer or Western Union. It's Bitcoin.