Is my wallet safe?
Short answer, we don't know, but it's certainly more risky to use cracked Windows 10.
is there a spy on the cracked windows?
If you exclude spy done by Windows/Microsoft, it comes down to whether people who create either cracking application or cracked windows ISO/installer include spyware.
how do know that Cracked didn't inject malware and spyware, and send the data from my laptop to their server?
For most people, you have to trust it since actually check it's behavior require some expertise (e.g. analyze network traffic).
You can install a Virtual machine software like Oracle and then install Linux in it which is open source and free of cost.
And what you can achieve by doing this:
It's like running another device inside your Windows machine so anything installed inside the VM will not be affected by the malware of Windows such as your Bitcoin wallet, which you can also use to store sensitive information and it will be completely prone to malware which attacks windows.
It is more convenient for someone who is being a Windows user and can't afford two machines.
But f you enable clipboard sharing on the VM, you still need to be careful against clipboard malware on Windows.