You should not be sured that Bitcoin will hit 80k at the end of the year as price volatility can changed situation anytime, but from different crypto enthusiast that Bitcoin price will be mostly in consoledation zone this year and after halving we can expect some bullish sentiment in Bitcoin price. But one thing should keep in mind that Bitcoin mostly respect his previous move and as According to Bitcoin history mostly Bitcoin show green moves after some time not immediately after halving.
So may be after sometime of halving Bitcoin can hit your given price and make new ATH