It is always good to know that your eBay and PayPal account are safe. I check mine every day to make sure that no one has hacked in and stole my identity. I mean some people only check theirs once every week, which is enough. But what about your bank account?
You might only get a bank statement every month, but what if you have been so busy checking your eBay and PayPal account that all your money has been taken. It is so easy for this to happen these days.
So what I do know is internet banking. That way I can check every day what is going in and out, and at the same time, check for any unusual behaviour.
That way it only takes you 5-10 minutes to check your eBay, PayPal and bank account, and protect yourself from fraudsters.