Many people rush to invest in Bitcoin immediately they have the information of Bitcoin having coming to manifest but they don't know that If halving May fail and also may not fail
What do you mean by the halving may or may not fail. BTC halving is part of the BTC protocol and it must happen after every 210,000 mined blocks until all BTC's have been mined. The part where people want to make so much money after the halving is not a case of it failing or not, it is simply that people expect the price to immediately pump once the supply of new coins has been halved, and it always does not go in the way they expected.
I also don't understand what is meant by failed halving. Even though in reality we have passed the halving and are now in the post-halving period, just waiting for the bull run to occur. Additionally, Bitcoin Halving is part of the Bitcoin protocol mechanism, which is a programmed event that occurs once every 4 years.
Maybe what is meant by the halving failed is because they hope that when the halving occurs the price will immediately jump high, even though if you look at history, on average, there is a significant increase in BTC after 6 months to 8 months after the halving occurs. Halving never fails but we just need to be patient and wait for the moment we are all waiting for. In the period before the halving and after the halving, of course many new investors took advantage of this moment and this is nothing new, even previous halvings have happened.