Bitcoin

Software engineer Mike Caldwell shows the front of a physical Bitcoin he minted in his shop on April 26, 2013 in Sandy, Utah. Bitcoin is an experimental digital currency used over the Internet that is gaining in popularity worldwide.

( George Frey / Getty Images )

Software engineer Mike Caldwell shows the front of a physical Bitcoin he minted in his shop on April 26, 2013 in Sandy, Utah. Bitcoin is an experimental digital currency used over the Internet that is gaining in popularity worldwide.

  • Email E-mail
  • add to Twitter Twitter
  • add to Facebook Facebook
CTnow is using Facebook comments on stories. To comment on ctnow.com articles, sign into Facebook and enter your comment in the field below. Comments will appear in your Facebook News Feed unless you choose otherwise. To report spam or abuse, click the X next to the comment. For guidelines on commenting, click here.