My greatest fear is; what if 2024 halving comes and go without any kind of bull run?
That is very unlikely. Bitcoin halving causes shortage in supply of bitcoin because of the reward per block. And we know in basic economics that shortage in supply will mean increase in demand and that will result to scarcity. With scarcity, price goes crazy. All the past bitcoin halving produced bull run and I do not see that in 2024 being different.
No, Bitcoin halving does not cause shortage of supply but rather cause a psychological effect of people thinking Bitcoin will become rarer due to halving of incoming supply. It cause a logical idea of smaller supply and bigger demand due to increasing adoption, creating hype to the point of FOMO when the price starting to spike. It is a domino effect that has Bitcoin price surging at the end of the rope.