Are you in any way justifying investing without proper chain accumulation of emergency funds? Do you really mean to do that? Life is very unpredictable and whatever has a higher risk return does not worth attempting, not even investing without proper emergency funds. I don't think there can be any successful long-term bitcoin holding without a good emergency plan. So there's evidently nothing positive about investing without emergency funds.
Long-term investment means you invest what you can afford to hold for long and possibly what you can ignore it's existence. So enough plans must be made in the form of emergency funds and back up funds and all of your basic responsibilities. Talking about changing your quality of life because you are investing in bitcoin is dependent on how you mean. Every investor also deserves a good life. So don't even live a lowly lifestyle because you want to accumulate bitcoin. Any investment that makes you get malnourished or ignore your basic responsibilities would still not last.
I think that everyone's situation is different, some people may not have emergency funds, but they want to start investing gradually so they don't miss the opportunities. It doesn't mean they're careless; it just means that they're taking a risk with what they have at the moment. Yes, life is unpredictable, and sometimes we have to take risks to grow.
However, I do not believe it is right to say that someone cannot be successful in long term Bitcoin holdings without emergency funds. It depends on the person and their plans, some people are very careful, they invest only what they can afford to lose and never touch their emergency funds, no matter how small it is. Everyone's strategy is different, and what works for one person may not work for another.
In my opinion, it’s all about balance. You can invest and manage your life well if you are wise and do not go all in. Nobody says that you should ignore emergency funds, but sometimes individuals want to make a move with what they have. The most important thing is not to invest money that can affect your other needs. In as far as you understand the risks and plan carefully, you can save and still invest at the same time.