I remember last year he said his company was considering whether to accept bitcoin payments, then the bitcoin price went up, then he announced that he wouldn't accept bitcoin payments, then the price went down. I really suspect he's playing a trick to make money from it.
Well now it is whatever cryptocurrency he wants his companies to support that will get these price pumps.
Doge coin has reached past $0.10 on the news and trending up since the news of wanting to find a payments system for his platform, so it is obviously in the front running of everybody who is into cryptocurrenies choice other than bitcoin.
He is wanting to take on Apple with the announcement of wanting to create in his own Tesla phone.
With all the problems they have been encountering with factory strikes and now this, it is literally the perfect time for him to say "I don't need your approval, I will just create my own resource to distribute the twitter app on my own!".