The Bitcoin Standard is the first book I've ever read to simply explain the properties that make money valuable.
If there were such a thing as a 'Bitcoin University', Satoshi's white paper would be covered on day one, and this book would be covered on day two.
Get up to speed on your Bitcoin education.
https://youtu.be/T4ltMvjGO5YYou can find answers of your question in its features!
Bitcoin is limited and will be only 21 million. So if you compare any FIAT money with it. I think you can understand. Supply-Demand!
Bitcoin is decentralized. So no one increase or decrease total supply. And no one control it!
Bitcoin is transparent. (This is the feature of blockchain actually but valid for BTC.) You can track all transaction easily with blocks.
And BTC has a great community support. All world be aware it potential now.
The overall thing that makes Bitcoin (or any item/services) valuable is DEMAND. Let's not forget that Bitcoin didn't become valuable overnight because of its limited 21million supply. No! It didn't happen that way. Otherwise from the beginning of its creation it wouldn't have been sold at less than $1 or the Pizza dude wouldn't have given out his 10,000btc just to eat 2pizzas. So, this goes beyond total supply or decentralization. It's the community demand that keeps price of Bitcoin up.