Yeah, our endpoint is profit but only those without plan, target will get caught in this analogy of yours especially those who were present for immediate profit (gambling Bitcoin prices). Every financial market has time or seasons, let me say something have we considered why; Price sells from a particular point and why it buys from a point too, who were those involved, who bought at that higher price, who sold at that price, this are simple question we ought to clearify.
I always and will keep laying emphasis on the need for having a target and being discipline, DCAing with getting exhausted and allow the market do it thing and not being fretful because of pump or dumps in the market.
Sometimes new traders still find it difficult to carry out plans like that because usually they still use trading money from the money they use for their living needs so that when they are trapped at high prices they feel depressed and sometimes also consider cryptocurrency trading as gambling. As new traders they must get proper guidance.
I don't get you, are you referring to a trader or an investor? These two may be similar but they are not the same thing, and on reading further on what the user you replied to stated, I discovered that using trader in that context is not appropriate, it should have been an investor. DCA is never in trading unless the trader is only forcing it with a similar idea that I know may eventually not be used accurately as though one is investing. It is actually a term of an equal proportionate investment used to average the risk in investments. And of course, this is good but nothing is without its challenges if it is not done properly. Any new investors should make sure that they understand the investment very well before dabbling into it, and also the risk and how to curb issues with management and other plans.
With this, I am certain that a few mistakes attached to investment will be avoided. However, the DCA approach is not so difficult to apply to investments, this is unless the investor is not just serious or do not understanding it buy just forcing it. Again, when an investor is still facing financial challenges like you stated above, then the investor is not still ready for an investments, because he will be using the money he can't afford to lose to invest which is against the rule of investment. For this, he might lack focus or get emotional at a point which is not advisable. But the moment such an investor is ready, his mind must be out of that money so that the investment plan can be carried out rightly. For proper accountablity, the money can also be saved somewhere for effective injection into the market as and when due according to the kind of DCA approach he opts for.