i dont want this happen to me... does anyone know how to setup a cold wallet very easily?
Create a paper wallet on a computer that is not connected to the internet. After creating the paper wallet, employ a software that wipes the hard drive overwriting deleted file sectors with random data, reformat the hard drive of that computer and reinstall the operating system. Don't plug it into the internet or plug in any devices or USB until after you wipe and reformat.
Then spend your BTC to the public address of that paper wallet.
Store multiple copies in multiple secure, secret locations of that printed paper wallet in fireproof and weather proof storage.
No one can get that private key electronically, so no one can steal those BTC electronically. It is up to your preparations to insure the printed private key(s) can't be stolen physically.