There's no question that it's been a good investment, particularly if you bought at the right time.
It's more important when you sold. How many of these people do you think have held on their coins till now? And how many knew about Bitcoin in 2010? Some nerdy computer guys fucking around with their hardware and figuring out stuff on their own that's how many lol. Plus it's very easy to draw conclusions after the fact lol.
I think there are very few people who can keep Bitcoin at this time because they tend to sell when they make a profit and buy when it's cheap. If anyone buys BTC in 2010 and keeps 2017 then surely they are enjoying their life without doing anything.