With the introduction of cryptocurrency from 2009, it becomes more and more famous and, with the interference of new technologies, it spreads widely among small traders and professionals. It is now a challenge to know how to convert it into another form and what methods are good for conversion. Cryptocurrency is essentially digital or electronic money and can not be used without converting it into a real currency. In its real form, users can not get their products out of everyday life, and turning digital currency into a real form of currency with profit is an art. Ethereum is one of the forms of cryptocurrency and his piece is called ether. It consists of blockchain core technology that has a complete network system for ether exchange. Ethereum is the largest platform for ether exchange with smart contracts or digital applications. Smart contracts are the major electronic books used to back up all customer transactions. Electronic applications are used to run programs ...