Riot Blockchain, a cryptocurrency miner that focuses on bitcoin, has appointed Gateway Investor Relations A cryptocurrency miner that focuses on bitcoin, Riot Blockchain, has appointed Gateway Investor Relations, leading strategic financial communications, and capital markets advisory company, to provide investor relations and consulting services to the organization. Gateway is a strategic financial communications company specializing in advising public organizations across a broad range of industry classifications. Established in 1999, the company provides high-level capital markets...