So why would your copy be cracked unbeknownst to you? Obviously, if you cracked your copy of Windows yourself you wouldn’t be reading this article. Microsoft seems cool with it, so until their stance changes you might not actually have to pay any money for a Windows key. If you want to use Windows 10 on a secondary computer or in a virtual machine where you don’t care about the minor restrictions imposed by not activating it, you may never have to bother.
You can save up for a Windows license and buy it when you’re ready. So if you’re in a hurry to get a key because you believe your computer is going to stop working or isn’t getting security patches, you don’t have to worry.