I have had two WordPress blogs hacked into in the past. That was at a time when I was doing very little internet marketing, and until I found time to address the situation (months later), these sites were penalised in the search engines. They were not removed, but the rankings were reduced.
I back up my blogs using a free plugin WP DB Backup. If anything happens I will restore my website. I use my blog to be scanned by WP Security Scan plugin that is free and WordPress Firewall to block asks that are suspicious-looking to repair hacked wordpress site.
Should the server of your site go down for will go with it. You will make no sales, get no traffic or signups to your website, until you get the site back up 32, and in click to find out more short, you are out of business.
In case you ever wish to migrate your website elsewhere, like a new web host, you'd be able to pull this off without a hitch, and also without needing to disturb your old site until the new one was set up and ready to roll.
WordPress is one of the platforms for blogs and websites. While WordPress is pretty secure out of the box, there are always going to be individuals who wish to create trouble by finding a way to split into sites or accounts to cause damage or inject hidden spammy links. That is why it's essential to be certain that your WordPress installation is as safe as possible.
Do your homework and some hunting, but if you're pressed for time and need to get this done once and for all, try out the WordPress security plugin that I use. It's a relief to know that my website (and business!) are secure.