If you consider your OC-ing to be just having a tool, like a cell phone, a Spyderco, a tactical flashlight, would you avoid carrying those in crowded places? Why not, someone could assault you and steal your iPHONE?
Just need to practice retention, have a retention holster, guard your personal space. The more crowded the space is the more likelihood that someone else would also be armed, even other OC-ers. OC with a partner if you must until you 'get over it'.
Dozens of people on this forum will be glad to tell you of OC-ing in crowded places with never an incident. It's a 'false premise', a fantasy that something bad will happen, just like antis who predicted a bloodbath in the streets when 'shall issue' laws were passed.