Wall Street is the least likely to fork—their priority is preserving monetary value. The incentives naturally push them toward the longer chain, reinforcing Bitcoin’s security and stability—which, of course, is a good thing.
The bigger risk comes from disaffected developers—a reality in every FOSS project—who see an opportunity to make a name for themselves by adding their "must-have" feature to "save" Bitcoin. And the problem? It’s all too easy for them to be swayed, whether by ideology, incentives, or external influence.