Investors should choose strategy that works for them. DCA is good way to invest in Bitcoin for long term. Buy Bitcoin regularly no matter price to reduce risks. Stick to plan and do not try to guess when price will go down. Bitcoin price is unpredictable so it is hard to know when it will drop. I also believe just like you in Bitcoin future because there is only 21 million of it and I think it will become more valuable over time. The phrase In Bitcoin We Trust shows strong belief in its success.
I agree that everyone should make their investment based on their financial status and capabilities. Someone doesn't have to follow someone else's investment pattern because they might have a different budget and capital and yours might not be able to match that. So one should see how much money they have, and how much they can arrange for their investment and they should plan their DCA according to that.
Please don't starve yourself just because you're buying Bitcoin with DCA. We should always use money that isn't too much for us to spare.
That's a common mistake among new investors. They don't have proper investment plans, they invest every money they have in Bitcoin hoping to get quick profits whereas Bitcoin investments are usually good for the long term because the price in the short-term is more unpredictable.
Some even sell properties and other stuff they own only so that they can invest the money in Bitcoin. I believe that shouldn't be done unless they can afford to do that and won't have any financial problems in case the price goes down after they make their investments.