It's a good idea,if this will happen that means cryptocurrencies will be used to pay charges like taxes in the way we use physical cash,but I don't think a state can have it own law without approval of the federal, and the senator in question Wendy Rogers has a record of being a controversial person who has ties with anti-government group,I don't think U.S Govt will allow this bill to become a law,well they may see into it in the future.