There are millions of blogs. Money is being made by some people and some don't. Many of the bloggers use WordPress at the moment. You will need to be certain that your blog is secure.
There is a part of config-sample.php that's headed'Authentication Unique Keys.' You will find four explanations that appear inside the block. There is a hyperlink how to fix hacked wordpress site inside that part of code.You copy the contents which you return, have to enter that link in your browser, and change the keys you have with the pseudo-random keys given by the website. That makes it harder for attackers to rapidly create a'logged-in' dessert for your site.
Use strong passwords - Do what you can to use a password, alpha-numeric, with upper and lower case and special characters. Easy to remember passwords are also easy to guess!
Keep your WordPress Installation up to date - One of the simplest and most valuable tasks directory you can do yourself is to ensure that your WordPress installation is upgraded. WordPress provides you a notice on your dashboard, so there is really no reason to not do this.
Make a note of your new password! I recommend the free or paid version of the secure software *Roboform* to remember your passwords.
Implementing all the above will probably take less than an hour to complete, while creating your WordPress site considerably more immune to intrusions. Sites were last year, largely due to preventable safety gaps. Have yourself prepared and you are likely to be on the safe side.