Really says it all. For the initiated, RD, PD philosophy on getting rich is to find suckers who will pay for your advice on how to get rich.
I too have watched the first couple lectures of an Andrew Ng course. Haha.
There's some guy on YouTube I watched who does gold mining by hand on property you can either buy or lease. There's apparently still tiny amounts of gold near the surface in high enough purity for it to be possible. He does in fact extract and sell small amounts of gold. I imagine his book he wrote about doing this makes him more money than he ever could make mining gold.