The article considers a new tool for portfolio investors - cryptocurrency. - its concept, the technology on which it is based, the advantages of this technology, the attractiveness of cryptocurrency for investors, existing investment methods, as well as a comparative analysis of the profitability and volatility of Bitcoin, Etherium, Litecoin cryptocurrencies and shares of Virgin Galactics, Nike, American Airlines. Currently, such an investment tool as a cryptocurrency is not always perceived positively, there are disagreements about its significance and investment attractiveness, many states deny and prohibit the use of cryptocurrency as a digital currency option. However, every year the popularity of this investment asset increases sharply, investors of various levels come to the cryptocurrency market, gradually some countries accept and legalize the use of cryptocurrency. The paper also presents excerpts from the unified glossary of the Eurasian Economic Commission, which considers cryptocurrency as a new investment tool, as well as a protective mechanism against the volatility of other investment assets. In the modern world, technologies are developing rapidly, new ways of investing and portfolio analysis are being born, for example, algorithmic trading, which allow the investor to adapt to the peculiarities of cryptocurrency trading.