If you don't get suitable bearish then you can start depositing bitcoins with DCA method and if you get low price of bitcoins during deposits regularly then lump sum buy may be more useful for you to get more holding in less time.
At least it seems that you understand the three methods, even though you seems to be conceptually mixing them up at the same time.
If we don't have separate portfolios, it may be better to tend to mix in bitcoin holdings. Our main objective is to try to build a bitcoin stash and DCA is one of the ways to accumulate regardless of value. DCA method is very effective for a beginner investor as observed from my investment experience but a lump sum decision should be made immediately if an investor has enough money.
It is better not to tend to wait for dips as lump buying may be delayed and allocated funds may be spent for some reason. That is why an investor should make a buying decision regardless of the price based on the immediate decision. This can be very positive for increasing bitcoin holdings and holding more by circulating the accumulation cycle.
In fact, if an investor can apply the investment strategy correctly, he can get huge Bitcoin holdings in a short span of time. The right strategy tends to be patient and long-term accumulation.