Same thing. People value altcoins just like they value Bitcoin, a bank account, an iPhone, a hamburger or a glass of Coca Cola.
You are giving the answer yourself. "People see bitcoin as a store of wealth". It's not a universal truth, it's a perception.
But it's clear you aren't looking for an answer, but just complaining.
You are retarded if you can't see the question I'm asking you keep reverting back to bitcoin when I'm talking about every other crypto tech.
"People value them" is basically saying it's all speculation and there's no real value other than that behind them.