Your point is valid, maximizing Bitcoin allocation early can accelerate long term gains, but it is also a higher risk approach. The challenge is that without a decent emergency fund, unexpected expenses could force you to sell Bitcoin at an unfavourable price, effectively turning a temporary dip into a real loss.
It's impossible for you to have a decent emergency funds in the beginning of your bitcoin accumulation phase because you need up to a year or two to be able to build up an emergency funds of three months of your income. This is the main reason why it's important to build your emergency funds with the same amount that you are using to DCA for a start til you have built up your emergency funds.
Emergency may come or not, therefore allocating more money to your emergency funds and allow your bitcoin investmet to be two times smaller than your bitcoin investment is wrong because of debasement of fiat currency overtime.
Prioritizing emergency funds is very important for financial stability, especially when you want to start your investment journey using DCA. Also allocating some money to emergency fund while start DCAing is a very solid advice because that would ensure that one isn’t left vulnerable while chasing a long term goal.
Again, your statement of it being impossible for someone having a decent emergency funds at the beginning of Bitcoin accumulation doesn’t seem to be so correct. Because there are so persons who have build up an emergency funds even before going into investing in Bitcoin. Most people build emergency funds through regular income and budgeting, thereby prioritizing and strengthening their financial security. They might have been working for years now, probably have been building up their emergency funds all these years, then now decides to start investing in bitcoin this year using DCA method
Having an emergency fund is very important, you never know when you will face a problem where you can spend a large amount of money, so in case you are not financially affected, create an emergency fund so that you can handle the situation, for this reason, you need to be quite aware before starting to invest because if you invest in Bitcoin, you have to do it for the long term because the long term will help you increase your wealth, even if you do not own a large amount of money, you can still invest because to invest you only need a portion of your income source, even if it is a small amount, you can invest weekly or monthly using the DCA strategy. In this way, if your investment continues for a long time, you can strengthen your wealth which will bring security in your retirement life.