Miami is spending millions on a new rental assistance program, but the funding source, MiamiCoin, is only vaguely understood by city leaders.

Miami Mayor Francis Suarez said the city will partner with cryptocurrency exchanges to provide residents with digital wallets.

CityCoins founder Patrick Stanley said he's planning to expand to new locations.

Commissioners voted to allow the city to dip into proceeds of the cryptocurrency, which so far total $4.3 million in value.