Buy a little bit of bitcoin every week don't care if it's a $1, $5, $10, $100, figure out what you can afford every week and buy it, get rid of unnecessary expenses or whatever you can think of getting rid of and spend it on bitcoin
5 to 10 years if you buy some every week you will be a multi millionaire
Any advice will be useful when someone knows what Bitcoin is and how they can run it. Life in this world is not just about investing and even though Bitcoin is one of the best investments, not everyone can get involved in it. This speaks to how someone familiar with Bitcoin knows how to utilize it and the DCA pattern you are referring to will probably be used as the easiest way for people to accumulate purchases on a regular basis.
But back to individuals who intend to get involved in investing and most importantly know how to be responsible when involved in it and don't rush into investing before understanding the correct method. Increase your knowledge and try to invest responsibly and it will be much better than taking the opportunity to purchase a much larger amount.