Without a safe password, hackers can have full access to your banking information, email, social security information, and much more.
The website that I visited for some of this information is http://www.staples.com/sbd/cre/tech-services/explore-tips-and-advice/tech-articles/the-most-unsafe-passwords-of-2012-look-like-the-ones-from-2011.html
The place where I got this image is https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0CAYQjB0&url=http%3A%2F%2Fwww.keepcalm-o-matic.co.uk%2Fp%2Fkeep-calm-and-keep-your-passwords-safe%2F&ei=hOHCVMquPIHUgwTCpYHwCQ&psig=AFQjCNFHZJidL6eUPnpv0k_5lhrJqUTlrQ&ust=1422143892788868