As someone who is getting older, I have this to say: don't take a life advice from a 20-something, no matter how well meaning they are.
Rather stick with old bitter people, who regret not being young anymore? Personally I can find wisdom in 2 year olds babbling, as well as 90 years old. It depends on the person and time. I discovered, that you can learn something from any person (even if it is, how not to do things). And age is not the determining factor.
Such as?