Let's say that a person similar to you (Sim_card) had been investing into bitcoin for nearly 2 years as aggressively as he is able to do, whether that is $100 per week or some other amount, and eve from time to time, such person might come across extra money that he is able to invest into bitcoin, yet he might have to weigh whether he wants to invest all of the extra money right away or if he might want to split some of the extra money into buying on the dip and/or DCA.
Investing $100 per week is about $10,000 but if by any chance he received extra money and invested it in Bitcoin his portfolio might probably be more than $10k. But I think it would be a bit hard for him (including me) to weigh if he's going to invest them at ones on during the dip or DCA. However, I would prefer to invest them all at once while using the DCA strategy, the only thing there is that I will increase the amount I want to DCA with only when I have extra free funds. Although it wouldn't be a bad idea if I invest it during the dip, I just prefer the DCA method. The reason why I won't choose the dip is because I might not have the opportunity to experience the dip for a long time.
Actually, it's not just about $100, An investor for investing, "excluding income and all expenses" then use a certain percentage of any investment, (which they can afford to lose). Amount is not a fact, the most important thing is consistency and longevity.
If an investor invest bitcoin in DCA regularly without waiting for DIP, that investor will have the very opportunity to benefit the most from it. because the biggest advantage of DCA is that if you invest in DCA consistently, it provides average value in the long term (completely ignoring market volatility), which is a great advantage for investors, as well as being much more profitable. However, it must be long-term. but Because Bitcoin never guarantees an investor a guaranteed profit, but in DCA investment in the long term has a much higher "probability" chance of being profitable. And this is why it is recommended to use only the DCA method for Bitcoin investment.