I bought a hardware wallet finally but honestly, you guys can't tell me that hardware wallets don't have any disadvantages, is it safe to just use them without zero worries or let me just ask by saying what are the Don't Do of hardware wallets?
Avoid control C and control V malware, which means avoid clipboard malware. Still be safe and do not totally trust hardware wallet, your trust should be in you as an expert against malware and how to use wallet safely
Hardwallet is safe in my opinion as it cant be penetrated with such malicious links easily. Also if its broke, as long as you have the mnemonic phrase or private keys with you then you are safe. Losing it might compromise your asset within the hardware wallet.
There are hardware wallet that use secure chip, secure chip can be close source but it will be hard for anyone that steal your hardware wallet to know the seed phrase.
Some wallets use MCU, they can be open source like Trezor but physical attack can make the attacker to know the hardware wallet seed phrase, this is why it is good to use passphrase with this type of wallet. If the passphrase is lost, the wallet is gone as bad as if the seed phrase is lost.
Some wallets use both secure chip and MCU, it is will be hard to know the seed phrase with the physical attack on this type of wallet.
Is it possible in cryptocurrency to use something, as you write, without worries?
Above, you were given answers that would be no different from using any wallet. If you know how to properly store your keys, and passwords, be attentive to the security of your computer and send transactions correctly, you will be fine.
Otherwise, any wallet from an inexperienced person will look like a grenade in the hands of a monkey.
That is true but we should know that if having big sum of coins, we should use cold wallet, it can be hardware wallet or paper wallet or any other type of cold wallet. Paper wallet is free to use.