In the case of such person as he explained where salary is low, I don't think that even using 100% of salary to cater for the first months need would help, cause at the end of the day the next month would come with equal problems or even lesser or more still, and he would end up using the next months income to still cater for his needs, or a little would be left and he would invest that one for the next month as you said.
But what about the upper month, and the next and till he continues to be in that state of low income, I think this would really affect him cause his investment would be mostly inconsistent and he might not even be able to succeed as an investor cause emergency might also occur and he would have to cater for those too, and if this inconsistency continuities it might also lead to him starting to procastinate and giving excuses which could cripple his determination and goal, what I think is best for such individual if they must invest is to remove an allocation of 10% to build up for emergency first or divide that 10% for both DCA and emergency funds, so at least they have started and they would now see the need for a salary raise to boost their investment and manage the rest 90% for needs and expenses, such person must also have a high discipline more than another investor starting with higher capital and comfort to manage his cashflow and chunk some unnecessary expense out to help himself.
Cause I think so far in this thread we have come to agree that cashflow would also play an important role in one's plan to accumulate bitcoin, either a person of this level would be okay to do poorly untill he can grow his income or should not bother investing, cause he would always be at a state of emergency.
While I'm not saying a person with low income cannot invest, I'm just establishing the fact that it would be too difficult for him to endure cause his progress would be slow, and his holdings would always be at risk to poor emergency funds and low cashflow, which are two major important factors we need to accumulate bitcoin successfully.
A person with such low income will find it difficult to invest in bitcoin. Therefore, the person needs to get a second job and also cut down his expenses, so that he will have enough to take care of his needs and also be able to invest in bitcoin.
Those who want to hold Bitcoin for the long term must keep a close eye on the crypto market. Whenever you see a dip in Bitcoin price in the crypto market, you will try to buy and hold Bitcoin. But I know that Bitcoin will pump multiple times in the next few years. .Now bin our time and expect to earn multiple times in a few years from now.
Generally the topic of discussion is strictly based on Bitcoin here and not shitcoins that is your use of the term cryptocurrency implies that you are including altcoins in the discussion whereas the topics is talking about long term bitcoin investment. Moreso talking about keeping close eye in the market movement isn't necessary for investors accumulating Bitcoin for long term, those who keep close eye to the market movement are known as the traders who's intention is to sell at any profit added to their investing for short term profit and that is not the topic of discussion because trading is considered to be gambling.
You are misunderstanding @Tmoonz, what he meant by closing your eyes as a long term investor means that you do not need to look at the market always so that you don't get distracted with the price movement of bitcoin, but ignore the market so that you can stay focus on accumulating your bitcoin through regular DCA weekly, monthly, or quarterly.
Indeed, for people who are optimistic about bitcoin, choosing a buy the dip and HOLD strategy is a good strategy to add to their portfolio. However, as an investment strategy, of course, buying the dip must be accompanied by controlling risk. One of them is by determining the target selling price when we buy when the price drops.
Not only that, this factor alone requires reading the direction of the market. For example, if the market keeps going up and up in a day, slowly and normally, in general, the lowest price is what we are most looking for to buy, especially if we have set a schedule beforehand in a week, at least we can buy and BTC installments at least 3 times.
Buying bitcoin with the BUY DIP and HODL strategy is indeed a very good strategy. However, if you invest in bitcoin in the short and medium term, market analysis should be studied carefully. Because this sales period requires that this be done seriously.
As a newbie, there is no need of having the mindset to invest in short term or middle term because you will not be able to achieve the goal of investing in long term which is the best way to reduce risk and also benefit from the compounding interest of bitcoin. It will be a waste of time and resources to invest in that way. Also you will give yourself too much burden checking maps and analyzing, which needs a professional skill, and the worst of it all is that with all those aforementioned, the possibility of you running at loss is very high than profit due to poor knowledge and high risk.