$BTC Bitcoin uses a special technology called blockchain, which makes it safe and hard to change. Every four years, the amount of new bitcoins given to miners is cut in half. This makes Bitcoin more rare over time, and has often led to its price going up. Bitcoin mining uses a lot of energy, which has led to debates about its environmental impact. Some people believe Bitcoin can protect against inflation because there is a limited supply, unlike regular money, which can lose value as more is printed. It's also becoming more widely accepted for payments around the world.