You've found the name of your dreams. Now secure it as soon as possible because until you do, someone could beat you to it.
If your ideal .de domain gets registered by someone else, there's no chance of registering it a second time as every web address is unique. Sure, it may become available at some point when the current owner no longer wants it. But that could be a very long wait. Years, even. No, you definitely want your name online today.