Noted! Thank you all. It seems like real estate is the better investment for long-term and bitcoins for short.
What about commodities? I don't see people investing in them much.
Commodities is mainly suitable to be invested by institutions. The commodity price is cyclical, ordinary people cannot grasp the peak and bottom. The main benefit of commodity investment is a hedge against inflation.
For stock investment, if you find a good company, you can hold the shares for very long time and benefit from the price rise.