Why They Matter
Your pivate key and seed phrase are the two central backbone of your crypto security this is because if anyone gets hold on either of them they can take all your funds. That’s why you should:
Private keys and seed phrases matters because they prove you're the true owner of your crypto wallet and funds. Without them you can't access your wallet. It's your responsibility to keep them safe, because you have the full control over them. If you lose your private key and seed phrase and someone else gets access to them, it can lead to permanent loss of your funds. Both should be stored privately, and you shouldn't reveal this information to parents, friends, or anyone else for the safety of your assets, because they might unintentionally or intentionally expose or misuse your security, which may put your assets at risk. To protect your assets, it's crucial to keep this information confidential and secure them at all times.
If you have a seed phrase, there is no use to back up your private keys. Seed was created for convenience and to have a single back up instead of many private keys. How do you intend to store private keys offline or engrave them on a metal plate? It's not possible that's why with seed phrase, it's human readable and can be engrave on any metallic surface and can be hidden on any location you like, nobody will ever have any access to it unless you tell them.
Been friends with people doesn't mean you have to trust anyone, money brings the inner character of people, you have to be very careful. Don't tell them you have Bitcoin, people have killed each other because they kmow the secrecy of their friends, some have sold each other out because of momey and some have disown each other because of money, not even your family you should entrust with Bitcoin unless you thinkbits necessary due to maybe death concern.