For me if Elon Musk didn't tweet about it people would just ignore it.
I think it gotten that high because of his followers not just in crypto but also his non-cryptocurrency followers bought it.
He got a massive amount of followers not just on crypto currency so maybe those non crypto people also bought Doge because of his words.
If elon musk was not tweeting about doge and the price of doge is quite stagnant or it even goes down again to the bottom. Elon has a very big impact on the doge price.
Elon makes a bunch of people bought doge coin at the same time.
We can't deny that the impact that already brought by elon to the doge is so big. Doge needs elon to be pumped by the whales.