The company is considering internal and external candidates for Genito's replacement.
Steffens departed from Marvel in 2013 to become CFO of Broadway Video.
Bready, a 20-year industry veteran, most recently served as CFO at ITC Holdings.
Bitcoin is the best-known cryptocurrency, but it is not the only one. There are hundreds of "altcoins" vying to compete with bitcoin and are based on bitcoin's underlying open-source software.
Alter has been CFO at Ikanos Communications and Silicon Image, helping to take both public. MapR is considering an initial public offering.
Del Matto takes over as CFO James Beer leaves to become CFO at McKesson. Symantec is considering internal and external candidates for a permanent CFO.