Yes, NANO coin (previously known as raiblocks) is legal in the United States. As a decentralized cryptocurrency, NANO operates on a blockchain network that allows for secure and anonymous transactions. The United States government has not banned the use or trading of NANO coin, and it can be freely bought, sold, and traded on various cryptocurrency exchanges that operate in the country.

However, it is important to note that the legal status of cryptocurrencies, including NANO, can vary from state to state in the United States. Some states may have stricter regulations or restrictions on the use of cryptocurrencies, so it is important to research and understand the laws and regulations in your specific location.

Overall, NANO coin is considered a legal form of digital currency in the United States and is widely used by individuals and businesses for various transactions and investments. As with any cryptocurrency, it is important to exercise caution and due diligence when investing in NANO coin to mitigate potential risks and ensure compliance with relevant laws and regulations.