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.
You will still get infected, but with expert help and good incremental backup systems, the downtime will be reduced and the impact of this threat will be almost zero downtime. I think the majority of
these guys, did not do frequent backups at all, and then have to pay these people to retrieve their data. Why would you pay, if you had recent backups? We have offsite backups and we have several
hard copies of the archived data. Just do the backups regularly and you will be fine...