So for example, historically maybe
in the last 9-10 years, a bitcoin investor (a person starting to invest into bitcoin on January 1, 2014) who had invested into bitcoin around $10 per week, might feel quite good right now because his having had invested $4,700 would have resulted in more than 4.5 bitcoin feels pretty good; however, if he had chosen to invest at $100 per week, his amount of bitcoin would have had been 10x that amount.. but his amount invested would have had been 10x that amount, too..
These days it is more difficult to suggest that investing at $10 per week is enough (as it would have been enough if a guy had started investing into bitcoin in early 2014) - on the other hand, it is true that any of us are ONLY able to invest as aggressively into bitcoin as we are able to do, and if we are NOT able to muster up enough extra cash in order to invest $100 per week into bitcoin, then we need to figure out how much that we feel that we can do in order to be aggressive, but without putting our own finances and psychology into to much stress during the process of holding whatever quantity of extra cashflow aside and putting it into bitcoin.
Maybe in 2014 bitcoin was not as popular as it is now there is more and more interest in bitcoin investment in any way so for those who have started in early 2014 for the next 9 years they will make more bitcoins at that time the price is still low and not as big as now, maybe at that time there were very few of them doing DCA with $10 for example so whoever did earlier then he just made more BTC earned.
Slightly different now many have done DCA with their nominal variations included in their dollar cost averaging $10-$100 is a good benchmark depending on how they can afford to do with the cash flow they have along the way, if you start now, for example, doing DCA of as little as $ 10 for 9 years, the BTC you will get will be small but the value will be higher with a price that will increase each cycle.