ソース:[1] Block CEO Jack Dorsey Invites Businesses Using Square PoS System To Test Bitcoin Payments Feature (https://finance.yahoo.com/news/block-ceo-jack ...)[2] Bitcoin's Transition to Mainstream Payments: Block's Square as the Catalyst - AInvest (https://vertexaisearch.cloud.google.com/groun ...)[3] Square Turns Bitcoin Into a Checkout Option—Changing How Small Businesses Get Paid (https://vertexaisearch.cloud.google.com/groun ...)