What kind of investment will be the most profitable industry in the next three to five years?

In the next three to five years, if you want to make money by investing, I think it will be the tourism industry or the science and technology industry and the food industry, because these are all in real life, and now the prospects are very good, because people's economy is becoming more and more developed and their level is getting higher and higher, so the tourism and food industries have occupied two major industries.