Mo Salah is due to leave the club because he has roughly spent 8 years of his football career at the club so if Liverpool succeeds and win the Premier League this season he should just leave with his glory. Sure, Liverpool needs more young talents to the squad to help them prepare ahead of next season because the league will be very competitive and tensed next season, some teams like Manchester City could probably rise up again next season so Liverpool needs to sign more young players who will be able to play and compete other big teams without being exhausted. Mo Salah has been very contributive to Liverpool, his performance for the club is highly appreciated and his impact to the club has also helped to maintain the club to a quality and competitive standard so its time for him to make some huge income at the Saudi League since that will likely be his next destination after exiting Liverpool.
I was thinking that is Salah win the Premier League and go far in Champions league since it's very hard to predict, there might be an arrange for him to as a year or two to remain in Liverpool but after they lost two trophy to two teams, Newcastle in EfL and PSG in the Champions League knockout, he might leave the club because his chance of winning the Balon D'or has just reduced drastically, what he is going to be having wouldn't be a new to him again.
The way Arabs loves Moh Salah, I'm having this conviction that he might end up in Saudi Arabia, he wouldn't be wasting his time in any English league because the only trophy that can humble Salah now is Balon D'or and he is definitely not winning this one except if they want to use their usual of manipulation to win the Balon D'or. I mean, Manchester City won one despite been on same level with Modric but they didn't give him because some journalist made the vote, anything is possible with this trophy.