The more bitcoin you collect the more profit, because you can store it for a long time and this will be the DCA method. But currently if someone invested in October and his investment increased by 2 to 3 times in November then surely most success is possible with proven bitcoin long term holding.
Note that the bull market is not over yet, so even with bullish prices, if you hold Bitcoin with the DCA method, you will save on the purchase price. That's why DCA method is the best and has the most role in Bitcoin investment, so you accumulate Bitcoins little by little in which you can accumulate the maximum . And stay away from bank deposit, deposit bitcoin money.
Of course, DCA method is one of the ways of accumulating on a regular basis, yet I see no problem keeping some money in banks or however, you might be holding your fiat too, but yeah, with the passage of time, if you keep building your bitcoin holdings, then it will presumptively get larger and larger quantity of BTC contained therein, and if the BTC price goes up then overall, you would have good chance to have better returns with your BTC money as compared to having had kept such money in the bank.
You do likely have to secure your BTC in private ways, especially as they get to become larger amounts, so you have less possible issues with third party custodians. You also likely have to realize that there is no guarantee that your BTC will outperform your cash or other places you could have had invested your money, so you should be figuring out an allocation size into bitcoin that is comfortable for your balancing of your cash versus your investment into bitcoin versus your investment into anything else if you have other investments.