Elon Musk’s vision of turning X (formerly Twitter) into a full-blown “everything app” is picking up serious momentum. The latest development? X is getting ready to roll out investing and trading features as part of its broader transformation into a financial platform—not just a social one. According to Financial Times, these services will launch under the X Money brand and initially target users in the U.S.

Elon Musk, the visionary behind Tesla and SpaceX, has recently made headlines with his latest venture, X.AI Corp., an artificial...