Just watched it. Interesting documentary. It aired in 2014 so some stuff is old but cool to see some of the history like Mt Gox. One thing that should be understood is if you are investing and holding bitcoin, don't keep it at an exchange of course. Download it onto a physical wallet. But for trading like stocks, bitcoin is great for investment and I keep my crypto coins at a large reputable exchange.
At the time that documentary aired, bitcoin was at $400 per, if you had put in $1,000, you would now have around $28,750.
Or during the documentary when the guy gave up on mining, bitcoin was at $150 per. That $1,000 would be $76,590 now.
If you had sold in December it would have been $47,500 or during filming at the $150 per that would have been $126,540 in December.
Not bad for an almost 4 years investment.