Back in 2010, you could buy a Bitcoin for six cents. Now that same Bitcoin is worth around $16,8000, at least as of the time of writing. The price of this cryptocurrency, something that only exists as ones and zeroes on a computer, has exploded in recent months.
Cryptocurrency is popular because it's decentralized. There's no central bank controlling the value, or smaller banks charging you to transfer it from one person to another. Instead, cryptography is used to secure its transactions, to control the creation of additional units, and to verify the transfer of assets
This decentralization is most likely why a New York woman decided to convert more than $85,000 to Bitcoin before trying to send it to ISIS.