The main reason why for Bitcoin Bull Run in the cryptocurrency market as s a function of Bitcoin halving that normally occur every four years, with that normally bring scarcity of Bitcoin in the cryptocurrency market as a result of high demand with a little supply in the cryptocurrency market.
The Halving now will not impact bitcoin's supply as much, as we already have almost all of them on the market, but this narrative has always (until now) worked very well to define bitcoin's cycles, although I still think we will have an ATH before April, which would be unprecedented until now for BTC.