That's a good calculation. Lot many people as well users of our forum might be using bitcoin when it was around $300, but none could have thought that the price could peak this high. Their ignorance now make them feel, because if they have considered it with trust, they could have got richer by now.
The only real hodlers are the early adopters. Mostly of those joining bitcoin now are speculators and traders who will buy low, sell high. They will sell at every profitable opportunity and buy back on dips. That is not bad way to get rich as well. Holding and wishing the price goes really high is not the only way.
Agreed, and even if they start buying and hodl they will be also making great profits.