Bitcoin and Pi are both digital currencies, but they differ in several ways. Bitcoin is decentralized cryptocurrency, meaning that it is not controlled by any central authority or government. It operates on a blockchain network where transactions are verified by users called miners. On the other hand, Pi is a newer digital currency that is still in its development phase and is based on a different consensus algorithm called the Stellar Consensus Protocol. Pi has a more centralized approach, with a small team of developers overseeing its development and verification process. Bitcoin has a finite supply of 21 million coins, which are slowly released into circulation as miners validate transactions. Pi on the other hand, has no fixed supply limit and is designed to be mined on mobile devices without consuming too much energy. Bitcoin has been around since 2009 and is widely accepted as form of payment by merchants and individuals aroung the world. While Pi being a newer currency is not yet widely accepted as form of payment.