Bitcoin SV is a cryptocurrency, and in almost all jurisdictions, it is classified as legal tender, which means that determining whether or not Bitcoin SV is legal is dependent on where you're located. In the US, Canada, UK, and Australia, yes, Bitcoin SV is definitely legal and is taxed individually/uniquely in each of the previously mentioned areas. However, if the country you live in has explicitly prohibited the purchase and use of cryptocurrency, in that case, not only would Bitcoin SV be considered illegal, but all cryptocurrencies would as well. There isn't a singular or individual classification as far as law goes that prohibits Bitcoin SV from being used at this time. However, cryptocurrency and blockchain laws are constantly evolving and adapting, so always stay up to date on these just in case.