I know the mayor was trying to lure all those miners from China after the announcement of mining bans. Don't know what the crypto capital would signify. They had the bitcoin conference few weeks back but don't think that was much of an impact. Maybe they'll start accepting BTC as payment which I think I heard may happen for government stuff but not sure how that would work if the state overpowers the city. Could see a lot of scam coins start to pop up since scams seem to be notorious in Miami. With crypto being decentralized, be kinda weird to see a bitcoin headquarters or corporate office or an ETH or any other coin one.