The Robinhood logo is seen displayed on a smartphone screen against a computer screen displaying stock market graphs on Oct. 10, 2024.Dominika Zarzycka | Nurphoto | Getty ImagesThe Securities and Exchange Commission is dropping its investigation into Robinhood's crypto arm, the company revealed Monday.Robinhood said it received a letter from the SEC's Enforcement Division Friday, detailing in a blog post that the agency has closed its investigation into the crypto business with no intention of m...