I think the error here is in thinking, well, inside the proverbial box. My question is serious an does have lots of valid answers. For example, I did not say

I think the error here is in thinking, well, inside the proverbial box. My question is serious an does have lots of valid answers. For example, I did not say the answer had to be a passive investment. Flipping homes could do very well given one is willing to put in the effort. I have a friend who decided to sell a product found in most homes in the US. He didn't even make it. Armed with a phone and a laptop he turned an initial investment of $50K into about three million dollars in approximately two years. He probably worked 16 hours a day, seven days a week. He is now in the process of selling the business for many millions. It's interesting to see how many people are suggesting bitcoin.