I very much hope that Elon may be able to create a decentralized stable currency, allowing users to completely migrate to decentralization, because Elon's influence is enough to be a wedding dress for the new stable currency.
No, Elon musk is not interested in making his own crypto. if indeed he has aspirations to make his own coin, he doesn't have to bother making tweets about other coins that don't belong to him (Dogecoin)
I wish that he did. That way he would stop talking about bitcoin and doge, and he would start talking about his own thing and that would be a lot better for all of us. His own coin could go up a lot, who cares, but at least the market would be left alone and it would not do too bad.
Even in a case, where his coin does terrible is great, because it means people will lose so much money that they would stop caring about what he says, because they would know that even his own coin failed so why would they listen to him on anything else. But unfortunately it looks like he will not have his own coin at all, he would probably stay away from that as much as he can.