There are millions of blogs all around the Internet. Money is being made by some people and some do not. Many of the bloggers use WordPress at the moment. You will need to be certain that your blog is secure.
I back my blogs using a free plugin WP DB Backup up. I will always restore my blog to the 13, if anything happens. I use WP Security Scan plugin that is free to scan my blog regularly and WordPress Firewall to block suspicious-looking requests to secure your wordpress site.
Truth is, there is actually no way if your website is targeted by a master of the script. What you are about to read below are some precautionary measures you can take to minimize the risk to an acceptable level. Chances are a hacker would prefer choosing easier victim, another if your WordPress site is well protected.
Yes, you need to do regular backups of your site. I recommend at least a weekly database backup and a monthly "full" backup. More, if at all possible. Definitely if you make changes and regular additions pop over to this site to your website. If you make changes multiple times every day, or have a community of people which are in there all the time, a daily backup should be a minimum.
It's really sexy to fan the flames of fear. That is what bloggers and journalists and politicians and public figures do. It's great for readership and it brings money. Balderdash.
Change your password, or your WordPress admin and password username and collect and use other fantastic WordPress safety tips to keep hackers out!