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This is probably a good place to start. https://dfi.wa.gov/bitcoin

That seems directed more toward businesses and accepting cryptocurrencies from consumers. Seems like as long as you use one of their licensed and approved vendors (listed here: https://dfi.wa.gov/sites/default/files/documents/virtual-currency-licensee-list.pdf) you should be okay.

You can regulate cryptocurrencies? You can regulate blockchains? I know governments want to and try to but should they legally be allowed governance over your own privacy and things related to personal things on computers even and things that are decentralized and therefore not of a certain country or state or place as it is hosted and served and located on many servers in many countries all at the same time and is therefore neither here nor there nor anywhere, right? If government can go into your computer to see what you or may not be doing or having or buying or in renting or whatever, etc.... then what stops government from stealing from you or blackmailing you or etc etc? Do we want government the freedom to control and regulate us maybe too much in the name and for the sake of alleged safety?