Ransomware attack: Why do hackers want payments through bitcoins?

The recent ransomware attack has renewed a long-running debate about the dangers of digital currency. For those who are not yet aware, a malicious malware attacked almost 150 countries. The concept of the attack was simple: Your computer gets infected with a virus that encrypts your files until you pay a ransom.

"WannaCry" - the ransomware, asked users to pay a $300 ransom in bitcoins. The ransom note indicates the payment amount will be doubled after three days. If payment is not made after seven days, the encrypted files will be deleted. Security experts warn there is no guarantee that