That's not true and DCA is not something that just come out suddenly it has always been here right from the day one of Bitcoin, I don't no how you are seeing it because DCA is not like a physical entity that can be developed like that, so is like a theory that has already been on existence, so it was only left for people to know it and those who knows it then was also making a good use of it just like the way we are currently doing right now, secondly don't think that it was because of how low the price of Bitcoin is then that made people to disregard it, however you forgot that even while the price look that small the amount was also very big for people.