The latest ransomware attack that NotPetya (GoldenEye) took place last week wasn’t about making money out of Bitcoins.  It was a malicious attack to delete corporate data and designed to cripple corporations. It is better to Improve firewalls, upgrade to the latest OS, use a reputable AV scanner, educate users better and improve your backup regime.  At least this way you have a better chance of not losing data or paying a ransom.