In the real world 99.9% of people require fiat currency to obtain water, food, shelter, and the rest of the things required to keep them alive. This is actual real-world value, as opposed to the theoretical value that Bitcoin might possess some day if everyone buys into it and nothing goes wrong.
I (and anyone else) can buy food and water with BTC. This statement along completely negates your point. To understand why BTC is valuable and educate yourself on the topic of money, I recommend this book: https://www.amazon.com/dp/B07BPM3GZQ/
