Its not the database application of blockchain that is useful for CanYa as much as the smart contract it is written on. It executes a payment once the job is done/requirements fulfilled. This ensures service providers, once they fulfil the requirements of the contract, receive automatic payment.
IMHO, CanYa's price appreciation will be limited by velocity; the service providers who receive CanYa as payment will unlikely be able to pay their rent or buy food with CanYa. No sooner will they receive CanYa payments than they will sell their CanYa for Bitcoin or fiat or whatever they pay their bills with. It will need massive adoption to overcome this problem.
