The former holders of BTC often regret not being able to hold on to it, and later watched as the price of BTC soared away, becoming unattainable; wealth is only left for those steadfast holders.

Only a very small number of people can hold on, and naturally, only a very small number of people make money. This is almost the biggest pain point for most early BTC players.
Of course, the past is the past; what matters is now. Now, if you hold 0.5 BTC, would you sell it at the high point of 100,000 USD for cash, or would you continue to hold and see what happens in 5 years?
It is possible that among the current holders, only a few will continue to hold; people can only earn money within the limits of their understanding.