Do I need to upgrade my current hosting plan?

Hello guys,

For some time I'm thinking maybe I need to up my plan but really don't know if the current one is doing well. Here's a screenshot of today:

There are peaks but your still safe.. is that vps or dedicated server ?

Cheers

You have a couple of errors thrown to your visitors because of the CPU peaks. You may try to see whether you have cronjob (unlikely as it looks erratic) or peak hours. You may try to identify the resources footprints of your websites to see whether there are some optimisation possible.
If you don't have a caching plugin, you may use one, it will help with the CPU usage.
IOPS / Memory wise you are fine.

Na, add a cheap CDN in front of it, should bring down your peaks on CPU, like Bunny.net or Cloudflare. If it is traffic peaks, and not internal peaks on your server.

It depends on your current hosting plan and the needs of your website.