Show HN: DIY-DRY Password System
Even if your password is stolen from Facebook, the hacker can't use it to brute-force themselves into your Instagram account, as the password won't match. Instagram and other services usually code and "salt" user passwords with a hash system. For example, the Catinstagram17 to you is obfuscated in the checked against file at the service and it looks something like this: "9dC90Oy26#^Y." So, along with all the other encrypted user passwords in the list, they likely won't see your pattern.
For the banks and work with heavy restrictions, such as special characters, I just add that to the end.
*DIY is "Do it yourself," and DRY is "Don't repeat yourself."