He has no idea what is he talking about, in the U.S. history there were a couple of populists who could actually win the president's post, last of them was William Jennings Bryan.
Oil will stay here for the next 50-60 years, that's for sure. So you have nothing to worry about, except the amount of consumed oil should start decreasing after 2025.
Another good example, why you should be fearful when others are gready.
Here is article from Bloomberg.
http://www.bloomberg.com/news/articles/2016-07-25/nintendo-set-to-plunge-after-saying-pokemon-go-s-impact-limited
Well, think about it twice, it's not an easy job, I would recommend you starting with something simple, you can try investopedia's stock market simulator, it's quite good to understand how the market works (though the data is lagging)