As you probably know, Apple has recently
As noted by
This is a warning to all jailbreakers. Apple has patched the evasi0n7 jailbreak with the release of iOS 7.1.
Please do not update if you wish to retain your jailbreak. You will not be able to downgrade back to to 7.0.6.
As to the all those people who don’t care about their jailbreak, they’re free to update since the new version contains a bunch of important enhancements, new features and security tweaks. So, it’s up to you to decide whether update or not. Well, that’s all.