If you have a significant amount of bitcoins, you can get a hardware wallet like ColdCard or Vault (or even Ledger, but the company stores information about you that is not very good if you get hacked again). If you don't trust your hardware wallet or can't pay / keep it safe, you can make a great wallet.
Creating a cold wallet was a very difficult task in the past. No more. Here's a quick guide on how to create one using a USB flash drive and any offline computer.
Prepare the bootable USB key with queues, this is a fully functional operating system. The queues are made to store something on the hard drive, everything is done in RAM
Turn off the computer
disconnect Wi-Fi, printer, ALL network cables; This is a very important step!
connect USB key to queues and run it on computer
in Tails OS there is a pre-installed version of Electrum (bitcoin wallet software), please check the next step before opening it
make sure you are not connected to the internet or a Wi-Fi or Bluetooth device
run the energy and use it to generate a new portfolio
write a seed and xpubkey and some public addresses. Make sure to use uppercase and lowercase letters!
check the seed
Turn off the computer
Disconnect USB memory when computer is off
You can now receive bitcoin payments at the address you wrote on the paper. Go ahead and send some satoshi to the first address and make sure everything is working. If you need more addresses, you can generate them with xpubkey. It is very important to keep the seeds safe. Written on a sheet of paper or stamped on metal like SAFU.ninja and hidden in a safe place - two geographical locations are the best way to avoid disasters such as fire, water, tornado, etc.
If you plan to use your bitcoins frequently, Cold Wallet is not the best option for you and you should buy a hardware wallet. If you use bitcoins on a daily basis, a hot wallet like Samourai or Wasabi. If you have any questions write in the comments, I will try to answer them all.