"Happiness, if we're gonna define it, should be long-term and non-materialistic, which is a little hard to do here because money itself is a materialistic thing." - that part got me. I kind of think that hapiness can be earned only if we are happy with our current state. At the time people achieve their goals they will find different new motivations and do not appreciate what they already have. This can be true for wealth as well.
I also really support the idea that the best way to spend money is on experiences and others, just like you wrote :)
Edit: How do you do the quote formatting in markdown?
I think so too, but it's not always the case. It's not always possible for some people to be happy in their current situation, example being a bullied kid in a high school or a woman dealing with a toxic husband.
About wealth though, @apolymask and I had a discussion about something similar a while ago and agreed that it's possible to be happy with your current state and still desire for more. It's to keep a balance between gratitude and longing for better.
About the quote formatting, all you have to do is put a ">" before starting the sentence/quote.