I am not sure why people are expecting market movement whenever he tweets something. I mean, market movement is a combination of different factors and this tweet shows it's only one factor in the overall picture. When the market is already in a volatile state (the tail end of the bull market), and there are other factors contributing (El Salvador accepting BTC, economic tensions in the world) then an additional tweet can seem like it was the one that cause some movement, but it may have just tipped the scale a bit, that's all.
People are different this generation. They expect to put money into a Bitcoin doubler and win back double for no effort. They expect to go to a crypto casino and win big when they know the odds and the maths are against them. They also expect to buy shitcoins and then make 10x easily because they also expect tons of people and sheep to come in late after them buying up the same shitcoin to pump the price.
Just understand that people are beyond expectations and you will never be surprised anymore at Elon Musk impact on people.