Depends on the use of your computer. For the most part, there's is not a necessity to deploy a premium protection suite on our personal or home computers, a free antivirus is fine and enough. Just check the most used free antivirus like Avira, Bitdefender, AVG and more in Top 5 Free Antivirus for 2018. I would also suggest you read more reviews from different places before installing a protection suite as the major drawback of these freewares is the ads bundled with them.
However, in another case, a paid antivirus would be a wise choice in the case where you're running a business that requires an absolute safe environment in your computer.