Abstract: A method of using cryptocurrency to transact fiat currency purchases using conventional POS apparatus includes funding by a user of a cryptocurrency account that requires withdrawal transactions to be signed by both the user and a payment platform. Upon purchase initiation, a platform-issued authorization number is entered into a merchant's POS apparatus and transmitted to the platform. Upon verification of sufficient cryptocurrency, the platform transmits payment information to the user, and upon approval thereof by the user, the user transmits a user-signed cryptocurrency transaction to the platform, and the platform remits fiat currency to the merchant. As purchases continue during an aggregation period, each user-signed transaction is sufficient to fund the aggregated purchases. Upon termination of the aggregation period, the most recent user-signed transaction is executed to withdraw cryptocurrency from the user's account.

Abstract: A method of using cryptocurrency to transact fiat currency purchases using conventional POS apparatus includes funding by a user of a cryptocurrency account that requires withdrawal transactions to be signed by both the user and a payment platform. Upon purchase initiation, a platform-issued authorization number is entered into a merchant's POS apparatus and transmitted to the platform. Upon verification of sufficient cryptocurrency, the platform transmits payment information to the user, and upon approval thereof by the user, the user transmits a user-signed cryptocurrency transaction to the platform, and the platform remits fiat currency to the merchant. As purchases continue during an aggregation period, each user-signed transaction is sufficient to fund the aggregated purchases. Upon termination of the aggregation period, the most recent user-signed transaction is executed to withdraw cryptocurrency from the user's account.

Abstract: A method of using cryptocurrency to transact fiat currency purchases using conventional POS apparatus includes funding by a user of a cryptocurrency account that requires withdrawal transactions to be signed by both the user and a payment platform. Upon purchase initiation, a platform-issued authorization number is entered into a merchant's POS apparatus and transmitted to the platform. Upon verification of sufficient cryptocurrency, the platform transmits payment information to the user, and upon approval thereof by the user, the user transmits a user-signed cryptocurrency transaction to the platform, and the platform remits fiat currency to the merchant. As purchases continue during an aggregation period, each user-signed transaction is sufficient to fund the aggregated purchases. Upon termination of the aggregation period, the most recent user-signed transaction is executed to withdraw cryptocurrency from the user's account.