If you use Windows, you need to read the article by Steve Ranger in the ZDNet web site at: https://tinyurl.com/utqrle3. He writes:
“Tech security company Bitdefender analysed Windows security threats including ransomware, coin miners, fileless malware, PUAs (‘potentially unwanted applications’ that can compromise privacy or security), exploits (attacks based on unpatched or previously-unknown vulnerabilities) and banking Trojans.
“Bitdefender found that of all these threats, ransomware reports saw the biggest year-on-year increase – 74.2%. Ransomware also ranked first in terms of the total number of reports.”