define the word profit Why? Investment in securities provides an important channel for the society to raise funds, which is an effective way for enterprises to raise direct financing. The difference between the income and the total income has been realized To make new clients more easy to use, our focus is to simplify the complexity of the application based on the block chain, to provide a pleasant user experience, attractive design and consumers to understand the language. Everyone likes the CryptoKitties, which can be traded and fed, representing the value of cryptocurrency. Marx's interest rate determinism is based on the source and essence of interest. Marx reveals that interest is a portion of the surplus that the capitalist who lends capital is divided from the capitalist who borrows the capital, and the profit is the transformation form of the surplus value.