I think if Messi's conflict in Barcelona continues, it might be possible to leave his will.
It is not the first time Messi has conflict in Barcelona but in fact he never leaves or moves to another club. I highly doubt if he can go to another club with all the history and what Barcelona gave to him. I only think he will stay forever in Barcelona, like what Charles Puyol ever did for his career in Barcelona.
Eventually people gets tired and decides to move on, I wouldn't surprise if the board conflicts is the reason why he would choose to leave, It is quite easier if the conflict is between a coach and the players, you know it's usually going to be temporary, but when the issue from the board itself, it makes thing rather more complicated.
As said 3 months ago if Messi goes will go only at Juve to make the legendary duo with Ronaldo for 1 -2 year till Ronaldo will retire.
Messi and Ronaldo in the same team ? Nope. Not happening, Not in this life.
but is it, Sterling, really worth 160mill?
To be honest, Sterling is world class above the player he used to be and he's just 25 years old. However, I feel 160million is an overstretch, even in an overpaying transfer market, but he should comfortably hit the 100m value mark.