In mid-May, countless people across the world were attacked by a malware program that locked their computers and demanded money to unlock, in an attack dubbed WannaCry. The attackers received thousands of dollars in the form of Bitcoin. Bitcoin is anonymous and easy, which means its a favorite among criminals. Just how is Bitcoin used by criminals, how can you protect yourself from some Bitcoin scammers, and should Bitcoin face higher regulation to prevent criminals from being able to use the cryptocurrency? This article shall delve into the dark side of Bitcoin, and look at some of the negative aspects that present themselves.