"According to Joshua Fisher-Birch, who is an analyst at the Counter Extremism Project, crypto is extremists' preferred method of crowdfunding as any group can easily post a link to a wallet that can serve as a central destination where supporters around the world can channel funds. And while Bitcoin and Ethereum are among the most popular cryptocurrencies for mainstream investors, one of terrorist groups favorite cryptocurrencies is called Monero, due to its "untraceability.""