If you are so smart to call yourself an university teacher, one should expect that they know the importance to hire good people in the IT section that are knowledgeable on Bitcoin, ransomware, and security in general.
Honestly ramsonware only happens if you are doing idiotic stuff with the computer. If you are cautious and take basic security measures you will not get infected by ramsonware.
It only takes one person in the company or university to slip up and open an email attachment infected with ransomware. This is why ransomware is so common.