Bitcoin is the best money ever created. It is uncensorable, unconfiscatable digital cash. It’s borderless, so people can use it and send it anywhere across the globe. It’s completely supply-capped, which means that no government or person can erode your savings via inflation. And finally, it’s decentralized, which means that no one person or institution is in charge of it nor can shut it down—in that way it is sort of like the internet itself.
Check out the following to learn more:
Beginner:
The simplest explanation of Bitcoin.
Intermediate:
Great analogies to help you understand Bitcoin.
Bitcoin's background and history.
Advanced:
The history of money and why Bitcoin is a superior form of money.
https://bitcoin-resources.com/
https://www.lopp.net/bitcoin-information/getting-started.html