If literally everyone's saying we're in a bubble, by definition we wouldn't be. Nobody would be buying at ever higher prices in a bubble, so who's making those trades?
Sure, you might claim those people are unhinged and don't count, but they'd say the same to you. Unless you actually start going to your broker and buy a bunch of PSQ your comments here carry as much weight as mine.
People can simultaneously believe they're in a bubble and still be buying. They may believe that they'll be able to sell before it pops. Or they may believe if it keeps growing long enough it won't matter that it's a bubble, because they'll have made enough money.