He might need to provide his crypto stack as a huge commission for the corporate team that controls the world, supporting the political candidate they asks to and silent anyone that goes against them. Even though he's the richest person in the world, he's still an outsider when it comes to the business group that actually control's the world.
It's not as easy as it sounds. Even if Elon Musk convinced the regulators to launch his "financial super app", he's going to have trouble making it scale to the world. Not even existing public blockchain networks have been able to solve scaling issues. What makes you think "X" will? Unless Elon Musk is planning to ditch blockchain tech in favor of a centralized database, then it would be another story.
I think this guy just wants to gain the attention of the public. By creating a lot of "buzz", he's hoping to rise "X" from the ground up. But I seriously doubt the platform will survive when revenue is declining each day. Especially now when major companies stopped advertising on "X". No matter if he integrates DOGE into the platform, creates a new coin called "X Coin", or even uses an existing blockchain ledger such as XRP, he won't be able to save "X" from failing in the future. Everything ended when he bought Twitter in the first place. The world is full of surprises, so expect the unexpected. Just my thoughts