What people believe in has an influence on them, and this "what" is the underlying logic behind the "placebo effect" in medicine that can also affect patients.

Placebos are used not only for physical illnesses but also for mental illnesses.

People not only "believe in something" but also "doubt something", "dislike something", "feel disgusted by something", "fear something", "be terrified of something", "hostile towards something", "be superstitious about something", "pray for something"...

These "somethings" also have an impact on people's mental and physical well-being.

Just like believing that a rampant bull market is yet to come, and believing that there is no rampant bull market is the same.

Believing that a certain project will definitely become popular, or that a certain project will definitely break one billion can either make or break a diamond hand. Believing that alpha can be held until the end of the year, we will see how many people can still stay.