Michael Saylor issues stern advice to companies [https://www.thestreet.com/.image/t_share/MjE0MTA2NTM4ODQ1OTM5NTQ5/michael-saylor-djdkd.jpg] Michael Saylor issues stern advice to companies Strategy co-founder Michael Saylor thinks crypto companies expose themselves to security threats by posting proof-of-reserves. [https://www.thestreet.com/crypto/markets/michael-saylor-issues-shocking-security-advice-to-companies]