The most valuable stock on the US stock market in the next 40 years.

In the next 40 years, the next number 1 stock on the US stock market won't be Apple or Microsoft but it exists today. It's either a nano or small cap penny stock that will grow to eventually be the most valuable stock in world. I have no idea which one it is but there's a small subset of investors who are investing in it right now. In 40 years they will be multi millionaires because they chose to invest $100/$1,000/$10,000 into it now. Just like there were investors who were techies in their 20s in the 1980s investing in Apple and Microsoft back then and are now multi millionaires in their 60s.