I would think that it would be better to be a guy who had been accumulating bitcoin since 2017 with an average bitcoin cost of $18k** and with 15 BTC ($270k invested) rather than a guy who only has 10 BTC and an average cost of $9k per coin ($90k invested). The second guy ended up investing way less and he has a way lower cost per BTC, yet the first guy ended up investing 3x more, and at the same time, he ended up with 50% more BTC than the more whimpy second guy. We could illustrate how these kinds of things happen to show that variations of this does end up happening with some guys getting distracted into other things or trying to time their buys rather than ongoingly buying bitcoin.
**By the way, when I looked at this DCA calculator website, I saw that a guy DCAing bitcoin for the past 8 years would have had achieved around a $13.5k average cost per BTC, so I might be being a bit unfair to the first guy to show him having costs of $18k per BTC.
Admittedly both of the guys are in a decent position and the first guy's 15 bitcoin currently have a 200-WMA value of about $770k and a spot value of $1.8 million... which I think that the 200-WMA would allow him to withdraw perpetually at $77k per year.
The second guy's 10 BTC holdings has a 200-WMA value of $513k and a spot price valuation of nearly $1.2 million, so the second guy could withdraw at a rate of about $51.3k per year.
Which guy would you rather be?
The first guy of course. Firstly, I admire the commitment and consistency of being able to accumulate bitcoin over a long period of time which is in line with my accumulation journey and secondly, having more bitcoin puts you at an obvious advantage just as you explained the first guy would have a higher sustainable withdrawal rate compared to the second investor. The more bitcoin we have, the more advantage we seem to get on the long run, so it is rational for anyone who wants more success in his accumulation journey to put in the work to maintain focus and commitment in their accumulation journey because I believe in a popular saying that the end justifies the means.