The reality is that they would not have been able to hold for so long even if they bought 10 years ago. Very few have the patience to wait till 100x or more. Most of the investors will be sold at the idea of 2x or 3x itself. Some of the people that were able to hold for so long were those who had invested and then completely forgot about it. There is one more category of people who had complete trust on BTC and thus they stick with it for years.
When I bought bitcoin 10 years ago, I would have been a millionaire. I said it was the right thing. I speculate that this statement speaks not of who holds it the longest, but the profit it makes if we sell it now. When it comes to, very few people will last very long, that's a real thing. But in this context they are two different things.