I'm in my 20s and working towards saving towards retirement. I'm sort of obsessed with the idea of compound interest and how, given enough time, an investment can grow at an unfathomable rate.

This got me thinking: is there a legal mechanism through which I could make a charitable donation far into the future?

I know there are probably reasons why this theory wouldn't pan out in reality, but let's just play with this as an example:

I contribute $10,000 into some sort of legal instrument: a trust, account, will, or something I don't know about. I stipulate that it should be invested in a whole world economy index fund, e.g. Vanguard's VTWAX.

My second stipulation is that the money shouldn't be touched untill the year 2524. Let's say it grows at 3.5%, compounded annually. The investment would be worth $295 billion dollars at maturity (assuming this type of economic growth is even possible).

At that point, I'd have it all be donated to, say, individuals living below the global poverty line, or something generic enough to still exist in 500 years.

Thoughts? Is such a thing possible?

(Edited to fix my initial maturity $ figure)