If you don't have a steady source of income, why put all yojr funds in BTC?
Even if someone have a steady source of income, it is never advisable to put all your available funds in bitcoin. Rather a fraction of your disposable income is expected to be invested in bitcoin. Often times many investors makes this mistake. Because they have a source of income which they believe will last for long, they tend to be more aggressive with their bitcoin investment. I know there could be several reasons that might make an investor decide to be aggressive with their investments, but no matter how aggressive one might tend to be, never invest all of your available funds in bitcoin, simply because you have a source of income. It is a wrong approach, because anything can happen at any given time. As much as you are building up your bitcoin portfolio, you also need to be stacking up cash reserves.
There's no guarantee that your BTC investment would make you rich in the next couple of years. Again what will your BTC be to you when you are not healthy considerate or probably kicked the bucket?
It is believed that bitcoin will do more of an uptrend movement than downward movements in the coming years. Let's say 10 to 20 years from now, so investors who invested in bitcoin now and successfully hold their bitcoin till then, sand a better chances of making fortunes from their investments. If by chances an investor kicks the bucket as you have said, your bitcoin investment can be of benefit to your children. Your children and grandchildren will be glad that you made sacrifice for them by securing their financial future with your bitcoin investment.
When there are so many things to solve personal with your money, first set your accumulation plans aside, there will always be a chance to invest or buy BTC.
There will always be problems to solve in the life of a Man, that's why it is advisable to plan our finances ahead of time, and know the portion meant to be used and solve problems. That's why the DCA method is there, it gives investors the flexibility to solve their problems and still invest in bitcoin. DCA method is not that capital intensive, as it makes room for investors, irrespective of your financial capacity investors can do it with as little as they can. It is not a good idea to miss out on bitcoin because we are solving problems and problems don't end. $5 invested weekly through DCA is something. It is better than someone who keeps procastinating to a later date, without taking action.