We cannot really know the exact adoption numbers, yet many individuals are going to end up getting fucked because they are too slow to get themselves into bitcoin.
Right now we have some of the governments, institutions and rich individuals buying bitcoin and perhaps causing some folks to conclude that bitcoin adoption is higher than what it really is.
A lot of normies are going to be left at a disadvantage, and they will end up having to buy bitcoin at much higher prices, and even $250k is likely going to be a cheap BTC price in future years. Guys who are starting to invest now, and perhaps even needing to take 1-2 cycles or more to build up their bitcoin stash may well be able to get their bitcoin with an average cost that is less than $250k, since it can take a long time to build up a bitcoin stash, and each person has to figure out how much bitcoin that he needs, which is also a moving target.... and I personally, consider that figuring out your standard of living and then building up your bitcoin so that the 200-WMA value is 10x your yearly targeted income rate, then you will likely be able to live off of your bitcoin at that rate in perpetuity.
Yes, people who have not bought bitcoins today, if we look a decade ahead, I also agree that those people will regret it. Because now is the most ideal phase to start accumulating bitcoins, because currently the price of bitcoins can be categorized as still very cheap. So if you start buying bitcoins now, it is much better than buying bitcoins in the next decade. This does not mean that buying bitcoins in the next 10 years is a bad thing. But of course it will be a little difficult to collect bitcoins so that they can increase, because the price is certainly more expensive than now. So the point is buying bitcoins now is something that must be done, if we want to have a lot of bitcoin savings in the future. And DCA is the right purchasing method that can be done.