I'm a single, a grad student, and have some personal savings. Saving money is in my character, and for the last 5 years, I've been saving 1/8th of my monthly income, on average.
In the future, I know I won't have any kids, so even if I got married, it wouldn't change my saving behavior. I'm a simple person, and I know for sure that I won't, and don't want to, buy any houses, cars, or any such luxury items. Plus, it is quite possible that I can save a higher portion of my income in the future since my income is likely to increase faster than my living cost.
I want to increase the value of my savings and protected from inflation at the same time. On top of that, I want my money to serve a constructive purpose in the sense that the invested money will directly fund something to happen (like funding a startup). However, I don't want to put my money into a savins account nor do I want to put into the stock market directly (where I don't fund the companies directly, instead fund the investors who funded to company earlier).
As I'm neither rich nor have any welfare security other than my own savings, I can't just go and fund a startup where the risk is way higher than I can take.
Question: Given these conditions, what is my best option?
Note, I am (and will be) living in Europe.