"Dogecoin - Musk - Twitter" we are hear this words together very often last time.
I hope Musk will not implement paid 'EDIT' button
(only in DOGE hehe). But if he implements crypto payments into Twitter, for sure it will support BTC, ETH, BNB, and oth. popular crypto, not only DOGE, and also he most likely will add some paid services and "features".
I expect (hope) there will be still free registration and no paid subscriptions.