The best invest is :
4/ buy or build your own house.
house is not investing, because you'll be sitting in your money, and won't be able to invest in anything else profitable. Plus if you have to move around you'll prob lose money by selling your house in hurry or by it being vacant by some time at least. And the gov can always take your house undr any pretext.
I think Robert Kiyosaki speaks about this in one if his books, I think maybe on the Why we want you to be rich book