Estimating the Investment Risk in a Digital Currency Portfolio and Optimizing it Using Value at Risk

A digital currency is a complex form of electronic money.The process of transferring this system is quite direct, and compared to the traditional method, there is less cost and time for transactions to take place in different parts of the world. Digital currencies use a system called the Block chain,Anyone who understands the benefits of the Chinese block,It's empty in our country .Advantages such as the impossibility of manipulating information, intelligence and decentralizing processes, along with high transparency, are issues that optimistic about the future of this technology. In this research, we select a number of digital currencies with the highest transaction volume and liquidity to create portfolios. and calculated using the Value at Risk (VaR) approach and the return on the portfolio Finally, an optimal investment portfolio is offered.