Don't take this advice unless you want massively subpar returns. The idea that picking individual companies is "gambling" is quite frankly ridiculous. The information around NVidia being a great company has been around for years and years and was obvious to anyone who took a look at the company performance.
The same is true for companies like Netflix or Shopify. I invested in all three of the these companies for the first time in around 2013 and 2014, why? Because I did my research and due diligence and could see they were incredibly well run, operating in areas with lots of room for growth.
If I had just invested in index funds I would much, much less money than I do now.
If you're reading this comment and you're younger than 60, do not take this advice. Your risk tolerance should be higher when you're younger and buying good companies at good prices is not gambling, it's what Warren Buffet always did, and it's the best way to grow your net worth.