Dollar cost averaging has proven to work over time for those who have used that very method to position themselves into bitcoin.
get a side hustle or a business that you run which generates income, and save up by investing some percent of that into Bitcoin using the DCA method or approach, you can buy aggressively during the bear market or whenever that the market gives you a special discount.
The DCA has been a very effective strategy for Bitcoin investment, you don't have to be very rich to invest on Bitcoin using the DCA you just need an so as to generate your discretionary and be able to invest with it either weekly or monthly, with the DCA an investor can enter the market whenever they wish, whether during the bull or bear season, for low income earners you don't need to wait for the bear season when the market drops before investing and for the rich folks you can still continue using the DCA after doing the lump-sum, you can't always lump-sum after every interval that's why the DCA is very important cause it's useful for all class of investors.