Cryptocurrency illegal
He posted a picture of the person � soon known as the "Bitcoin Sign Guy" � who, in addition to holding up the now-infamous sign, shared a bitcoin address as well. Please note that our privacy policy , terms of use , cookies , and do not sell my personal information has been updated. We aim to create fun merchandise to help promote the adoption of bitcoin. The photo that included the address was ultimately deleted at the Bitcoin Sign Guy's request, though he later visited the nonprofit advocacy group Coin Center, which is headquartered in Washington, DC. Buy Bitcoin Sign Sticker.