카테고리 ?�음 바이?�스 ?�용�??�벽 가?�드! 가?��???거래까�? 초보?��? ?�한 ?�세 ?�명copyright (or copyright for short) is often a form of electronic cash ??in some cases known as a digital payment system ??that isn?�t tied to your central financial institution, government, or company.거래 방식?�