Have you ever heard the saying "Only invest money that you can afford to lose."
If you can't afford any losses just stop trading and don't buy any Bitcoins at all.
It's a Bitcoin cycle,not a Bitcoin circle.Other forum members already explained the process of halving.
There's no proof no guarantee that Bitcoin halving will actually pump the Bitcoin price.The halving just creates hype and expectations about a future price pump,which leads many traders to buy BTC before and after the halving.
Nobody is saying that there is some kind of yearly pattern of the Bitcoin price,like "one year is bullish and the next year is bearish".The people are only speculating about this bullish/bearish cycle.