Photo: Wikimedia Commons Bitcoin is digital money that you can send to anyone in the world without using a bank. In 2008, a mysterious person named Satoshi Nakamoto shared an idea for a cash system that runs entirely on computer networks. Today, millions of people use it, hold it, or trade it every single day. At its core, Bitcoin works like a shared digital ledger that thousands of computers keep track of together. Instead of paper bills in your leather wallet, you have digital coins secured by math. No company owns it, no government controls it, and no single person can turn it off. How Does Digital Money Work Without a Bank? Think about how your regular bank account works right now. When you send twenty dollars to your friend Sarah using an app, your bank changes the numbers in a private computer system. The bank takes twenty dollars from your balance and adds twenty dollars to Sarah's balance. You trust the bank to get those math problems right. Bitcoin handles this ex...