Abstract
Bitcoin and Ethereum have become the centre of public attention in recent years. Both are
cryptocurrencies, decentralised digital assets, it means, a set of codes that can be used as a
currency. Their value is generated by the public agreement. The attractiveness of crypto assets
is the safe and simple transactions between two parties without intermediaries. These digital
currencies based on blockchain technology, always containing all transactions. Unfortunately,
cryptocurrency is being a target for fraudsters and criminals because of the spread4 of the
transaction. In addition to the technological innovations and financial opportunities by digital
currencies raised without considering the ethical dimension, especially the ethics of money,
because not everyone gets the same profit they generate. Anonymity of digital currencies can
facilitate money laundering, terrorist financing and other illegal transactions. We are not
concern about the energy consumption and environmental impact of cryptocurrencies. It is
therefore necessary to effectively regulate cryptocurrencies in the fight against fraud and abuse
and at the same time to protect participants of this market. The use of cryptocurrencies can
make it difficult to identify which parties are involved (anonymity and pseudonyms), which
encourages fraud, if it contains money laundering and other illegal activities. The price of
cryptocurrencies can fluctuate significantly (volatility), which can also cause significant
financial losses to investors. Cyberattacks, hacking incidents and technical errors can
ultimately lead to the loss of crypto-assets (technological-security risks).