The title says it all! Sooner or later you will have a catastrophic failure of everything electronic. Your computer, your web server, your website, your smart phone, whatever. Trust me on this one! The only thing you can do is keep recent backups so you have some recourse when disaster happens.
Today, I want to focus on your website. First, don’t count on your web hosting company to keep backups for you. They may, or they may not, but it is really YOUR responsibility to have a recent backup of your site. And best yet, have one that you keep off site, say, on your computer.