Forex trading is the buying and selling of different currencies on the foreign exchange market. On the other hand, cryptocurrency trading involves buying and selling digital currencies (e.g. Bitcoin, Ethereum, etc) on a decentralized digital exchange.
The idea of a fully decentralized system, in terms of storage and transfer of data has been a theoretical model for many years. Nowadays, blockchain has made this a reality, with most common use in cryptocurrencies, while other sectors like supply chain management, can find this technology quite advantageous.