While I'm not sure what IOT blockchain is supposed to do - I guess it's a bit hypothetical at the moment - it might make sense for payments. For example your smart light socket could send some currency to order a new bulb when it goes. Or your router could charge some passer by a few cents to supply data service. While bitcoin is slow other stuff like Stellar take approx 5 secs and cost like 0.001 cents per transaction.

As an aside I wonder if your ccvt's AI system detected a party was happening and ordered some recreational drugs using some currency it came with when bought, who would be guilty.