Thank you for your answers. I also think the police won't do anything and I won't be able to get anything back.
Which secure BTC Wallet do you recommend for me to hold?
I heard about 25th words of 100 characters and multi sign.
I thought about Tails live USB which has electrum in wallet.
Hardware wallet is still the best. The problem is not the wallet you are using but rather the device which you connected your hardware wallet is probably infected by a malware. No wallet can escape with that kind of security threat so make sure to have a device with proper security before you start creating any wallet or else you will suffer the same fate.
It’s just hard to believe that hardware wallet can be hacked via online attack unless you giveaway the seedphrase and pin code of your hardware wallet