Recently I've been shoveling it into a long term project that will hopefully pay dividends in the longer term, but the jury's presently out on whether that will actually come to fruition. Time will tell.
I agree, not everyone can afford to live as frivolous a lifestyle. I've been very fortunate to have had the choices and opportunities I have to be able to make headway. I try never to take that for granted, because it doesn't take too many wrong moves and you're the one trying to scrape your way to get above the poverty line again.
My professional expertise and where I've spent the majority of my career is in software engineering, systems architecture, devops and test automation. In what little spare time I have I'm co-founder and instructor for an educational organic farm which means I'm often playing carpenter, mechanic and vet as well as being a full time Dad.
Recently, my son, still in primary school, had to check out a potential secondary school. My wife wasn't able to take him there, so I left early. Cost me €240 in revenue. That's a lot of money, but then again, I made more than that in the rest of the day, and I don't want to deny myself the opportunity to do these things with my son.
There's more in life than money. Sure, it's important, but only as a way to an end. Money itself is not the goal, life is. Don't sacrifice your life or happiness for mere money.
(Of course it's easy to say that when you can afford to. Not everybody can.)