Bitcoin[a] (₿) is a cryptocurrency. It is a decentralized digital currency without a central bank or single administrator that can be sent from user to user on the peer-to-peer bitcoin network without the need for intermediaries.[8]
Bitcoin goes through a process called halving every four years. The inbuilt mechanism reduces the reward per block mined on bitcoin's blockchain by 50 percent. Essentially, reward halving cuts the pace of supply expansion by 50 percent every four years.