Ключевые слова: bank, bitcoin, black, blackboard, block, blockchain, board, business, chain, chalk, chalkboard, commerce, concept, connected, connection, contour, crypto, cryptocurrency, cryptographic, cube, currency, data, database, design, digital, doodle, draw, drawing, ecommerce, finance, fintech, hand drawn, icon, illustration, information, internet, isolated, line, linear, mining, money, network, sketch, symbol, technology, web, white,