DeFi is multi-purpose; it is utilized as a source to find the best price among worldwide exchanges, without brokers involved. Therefore, DeFi is regarded as a free trade zone, where platforms present the best price at a certain time, and purposely provides maximum benefits to the users. Subsequently, it develops a feature in which the users utilize their assets to assist in providing liquidity to decentralized exchanges. The users will receive specific tokens as a reward, which own their actual value in the decentralized exchanges. The tokens can be converted into other currencies, such as fiat currencies via centralized exchanges (CEXs). Nowadays, DeFi is popular and draws a great number of investors into the industry. The liquidity in both cryptocurrency markets and DeFi markets is increasing, leading to better economic contributing factors.