Each person will have their favorite niches to focus. Personally, I like real estate very much, because it's a solid investment along the years, protecting your patrimony against inflation, but there are another alternatives as well.
In the same vein, if I had to choose which asset is best, I would choose real estate.
It is an asset whose value increases over time due to limited supply while demand increases due to growing population. It is also the only asset that can generate passive income through rentals, something neither gold nor bitcoin can do. But investing in real estate is not easy because it requires a large amount of capital and that is a big barrier for many people. Unlike bitcoin or other investments, we can invest any amount we have and accumulate it over time.