$BTC $BTC Bitcoin (capital B) is an open-source payment network platform, while bitcoin (small b) specifically refers to its associated native cryptocurrency. After the 2008 financial crisis and bankruptcy of several financial institutes, the innate trust in banks eroded. S. Nakamoto designed the Bitcoin (Nakamoto, 2008) as a decentralized currency exchange protocol to eliminate the role of banks as an intermediate for financial transactions. The transactions are based on bitcoin addresses to ensure anonymity. Bitcoin is a P2P network, which allows rapid worldwide payments, with low transaction fees and lower network cost. Bitcoin provides a distributed public ledger that records digital transactions from sender to receiver in a chronological manner. Bitcoin was the first to solve the double-spending problem of digital currencies without centralized administration from the third party. The consensus protocol in Bitcoin is PoW which ensures the immutability of the public ledger.