The number of sources of income does not make us rich, because enough with 1 or 2 work but all that success has made it rich. And investment is indeed very important to be able to make income better, so that the money we have becomes growing. What makes us rich is our perseverance at work so we can get good income and get rich.
Investment outside not in crypto because of being risky, yes any type of investment is risky but it can lessen if you will go for other type of investment. We can still have a good life here especially when you get a job and you are residing on third world country the value is much bigger rather than when you are residing on the first world country.