Elon is a businessman, he only makes a profit from everything he does. And what was done in the past by tweeting about Doge to make the price of Doge rise and become more popular was the intervention of Elon Musk, influencing many people.
There is no guarantee that Elon Musk will come down and have a direct influence on Dogecoin price movements. There is a possibility that those who will take advantage of this are whales who have a lot of capital and are able to move the price of Dogecoin in the market.
Elon is a businessman, so of course he cannot predict his steps to make a profit. It's true that there is no guarantee that Elon Musk will influence people to buy doge so that the price of doge will rise, but remember that Elon Musk has already done it. So the possibility of it happening again is there