Well, talking of the statement I make bold, you need to understand that most of this guy's that bought a very huge amount of Bitcoin at a go wasn't that rich as you think, most of them bought very early, they are those investors that put their hard earned money on Bitcoin when majority of us doesn't even dare to take such a risk, and that is why they were the biggest benefactor of the magnificent growth of Bitcoin, because they took the biggest risk to invest in Bitcoin then, but if someone can buy such a number of Bitcoin today, then that person would have been an established person already in the society just as you said, because Bitcoin right now is way more expensive now compared to how much it was 10years ago.

Then concerning your next paragraph, yes it's true that DCA accumulating strategy offers the same opportunity to acquire and own a very huge amount of Bitcoin, but it's not a day job, it might even take an average salary earner 10years to acquire up to 100BTC, some might not be able to acquire such number of it due to poor salary, but that isn't a problem too me, the most important thing is continuity, as long as you keeps on buying without tempering with the ones you have already, with time, you will surely get there as long as you keeps on buying.