Abstract: A method of conducting a virtual currency transaction through payment cards, which comprises steps of: a payer providing a payment card with an encrypted address; associating said encrypted address to at least one virtual wallet having crypto currencies; a payee receiving a predetermined amount of crypto currencies from said virtual wallet by scanning the encrypted address; and said payee depositing the crypto currencies into payee's virtual wallet. In one embodiment, the payment card can be, but not limited to a credit card and a debit card. In another embodiment, the crypto currency can be, but not limited to Bitcoin. In a further embodiment, the encrypted address can be shown as, but not limited to a QR code.

Abstract: A method of conducting an offline virtual currency transaction is disclosed. The method may include steps of generating one or more virtual wallets; depositing certain amount of virtual currency in said virtual wallets; a payer transmitting at least a portion of said virtual currency to a payee through an offline platform; and payee confirming reception of the virtual currency. In one embodiment, the step of transmitting at least a portion of said virtual currency to another user through an offline platform may include a step of scanning a QR (Quick Response) code to transmit the virtual currency. In another embodiment, the virtual currency can also be transmitted through infrared. In a further embodiment, the step of confirming reception of the virtual currency may include a step of said payee deleting private key.

Abstract: A method of conducting an offline virtual currency transaction is disclosed. The method may include steps of generating one or more virtual wallets; depositing certain amount of virtual currency in said virtual wallets; a payer transmitting at least a portion of said virtual currency to a payee through an offline platform; and payee confirming reception of the virtual currency. In one embodiment, the step of transmitting at least a portion of said virtual currency to another user through an offline platform may include a step of scanning a QR (Quick Response) code to transmit the virtual currency. In another embodiment, the virtual currency can also be transmitted through infrared. In a further embodiment, the step of confirming reception of the virtual currency may include a step of said payee deleting private key.