Just purely out of curiosity. 99% of people who don't know how to properly create an airgapped device should be using hardware wallets.
There are probably many reasons but I suppose the main one is that the majority of those holding bitcoin or altcoins are small holders which will need to use a great deal of their capital just to buy a hardware wallet, and as such it is not a very attractive offer for them, another reason is simply ignorance, whether that ignorance is about how to secure their computer or how easy it is for scammers to get to their coins they simply do not understand the risks and they prefer to not use hardware wallets.
i guess the same. if you are just a small holder, it is not worth buying a hardware wallet. you can even use electrum for btc. but paperwallets are also great. but if you are a big timer, definitely, cold storage is a must. but mostly only big businesses such as crypto exchanges are using cold storage.