Even though an investor doesn't have a good income source to keep a reserve and float funds, it is okay, but the investor should always make provisions for emergency funds, even if he has to reduce the money he will be using to accumulate bitcoin weekly or monthly just to build up emergency funds. It is important to have emergency funds when investing in bitcoin so that if any emergency happens, you will have what to use to settle the emergency and not depend on your bitcoin portfolio to solve it.
Exactly one of the reason I strongly preach against lump-summing as a formidable technique when accumulating bitcoin. Lump-summing could lead to aggressive accumulation that may affect other areas of your finance. People should always know that, inasmuch as your investment is necessarily important because it takes care of your long-term goals, there are also short-term goals one needs to meet, it could be from getting groceries to paying some bills at home.
Every strategy for buying Bitcoin is unique and solely depends on the investor in terms of his financial situation, risk tolerance level, investment goals and objectives (investment time horizon inclusive) the choice of strategies is not that really important to me but rather what is most important is how much of worth of Bitcoin do you have in your bag and how long can you be able to hold, I don't think if the Idea of lump summing has anything to do with being aggressive in your accumulation rather it has to do with buying right away with the available amount that is kept aside for buying Bitcoin, a man who has become knowledgeable about Bitcoin with so much believe can become limited in to investing in Bitcoin because of lack of finance, while receiving a huge amount of money can decide to to lump sum his first right away with the amount he made readily available to accumulate Bitcoin while other of his personal needs are already taken care of including emergency funds, while he may continues with dca strategy. The combination of the both strategies can as well yield a better results. However, every investor must tailor down his choice of strategies that will suits him or her which will enable him in making an Informed decisions.