What does Lin Manuel Miranda want people to think about being satisfied with their life?

It shows that satisfaction is something unattainable, as we will always be in search of something.

Explanation:

Lin Manuel Miranda plays with the concept of satisfaction in a conversation between Angelica and Hamilton, where both, even getting something that I benefit for them are never satisfied. This is because the complete satisfaction of the human being is something unattainable, we will always be wanting something, looking for something and desiring something that we don't have, but that would make us happy.

what did the protagonist say?

fearlessness is your answer