Musk considers Twitter as the 'town square' and he wants to bring all of those features for payment and whatnot that apps in China already have to his 'town square'.
I think he has been off the ball with Twitter/X, using it as his own private megaphone rather than building out the features, however, encrypted messaging is going to be the cornerstone of future developments such as a means of payment, or a WhatsApp rival and so on. I find it hard to believe, but maybe there is a cadre of engineers at Twitter with a vision of what it should be, and building out a serious platform.