Our blog site is indeed vulnerable to hacker attacks, and I myself have experienced being attacked by hackers .
WordPress.com is a free version. The way to use it is more or less the same as using the paid version, but there are some limitations. For example, with WordPress.com we cannot install plugins that can further enhance the capabilities of our blog.
Read about plugins here: Installation of selected plugins to enhance the hong kong gamblers phone number data capabilities of your WordPress blog
WordPress.com users will also be offered a package to upgrade to the paid version. When upgrading to the paid, or premium, version, you will get the same benefits as what self-hosted WordPress users enjoy.
However, the cost can be many times more expensive . If you are planning to upgrade to the premium version, I recommend that you contact the hosting company you want to use and discuss with them whether they have the expertise to import your old blog from wordpress.com to the hosting you will subscribe to later.