Bitcoin was invented in 2008 by an anonymous person or group of people using the name Satoshi Nakamoto and started in 2009 when its source code was released as open-source software.
Satoshi Nakamoto released the Bitcoin white paper in 2008, which outlined the basis for a decentralized digital currency that could be used to buy and sell online without the need for intermediaries. In 2009, Nakamoto released the Bitcoin software as open-source code, and mining began shortly thereafter.
Bitcoin's price has seen a lot of volatility over the years, but has generally trended upwards. As more people have started using and investing in Bitcoin, its price has increased. However, there have been a few sharp drops along the way, including one in early 2018 when it lost around 50% of its value in just a few months.
Despite these fluctuations, Bitcoin has become increasingly popular as an investment and store of value. Many people see it as a hedge against inflation and believe that it will continue to increase in value over time.