Personally, I'd like to see a way for investors to put money into some kind of broad-based startup index fund. I agree that people shouldn't be putting their life savings into a single startup. We don't like taking on that kind of personal risk (that's why we raise money) and they shouldn't have to, either. They should be able to take, say, $10,000 and put it into startups, plural.

Also, given that you're going to have a "power law" distribution of returns where a couple black swans are responsible for a large amount of the return, it's good for most investors to be in the whole spectrum; otherwise you get a St. Petersburg Lottery phenomenon where median returns are much lower than the (presumably quite high) expectancy.