Is there any benifit to hope the best for people

Ignoring the selfish aspect, I just cannot think of any gain to hope someone else does well - not verbally or to them just to yourself - and i just want to hear if anyone can think of any oposing reason. Im trying to look at this from the "your thoughts become words become actions" view point and im trying to see if eg: it causes you to do better in things yourself. All i can think of is that it makes you invested in their activities but that seems a bit passive and is just unwanted especially with people you dont like.

Looking for any (ANY) reason.