Actually an investor can choose more than one strategies when investing in bitcoin. Provided you know how and when to apply each strategy. So don't just think because you used one strategy to make your first buy, that you cannot utilize another strategy when you want to make another buy. You can also decide to divide your money into 3 parts, depending on how much you have as your investment capital. One part can be for lump summing, DCA, and another fraction for buying when bearish. This way you have seen that the investor has been able to make use of all the investment methods with the same amount of money. And he stands a chance of benefitting from all market conditions.
An investor can still decide to focus on using one strategy to invest in Bitcoin and succeed so it is not necessary that you must apply all the strategies while investing but the best is always investing with the DCA because you won't miss out at buying during DIPs which is the most important part of any investor who is still in the accumulating stage of their investment, lump summing is good for some people but I don't consider it to be a good strategy since you can go an all in and never invest again therefore you may never increase your portfolio and for buying at DIPs, it's also a very complicated strategy because you can be expecting a DIP and it may not come and you end up not buying so basically using the DCA is just the best strategy because you can also decide to increase your DCA amount depending on your cash flows before your next DCA as it can help to increase your portfolio with time.
When you focus on accumulating your Bitcoin assets using the DCA method, you must have a steady income to be able to run the strategy properly and you can buy it when you get income from the work you do, of course, you have divided it with your needs for a month and also other needs, because it will feel heavy when we want to use the strategy if we do not have a steady income, but if we really want to do it, of course we have to work hard and save every income we get from the work we do and buy it consistently using the strategy.
Buying when DIP is certainly very profitable, but we cannot predict how far the decline will be and I really agree with you that it would be very good if we want to run an investment properly, then we can use the DCA method and continue to do it consistently to continue to increase the Bitcoin assets we have.