Well your wallet is where you keep your coin safe and it always important to protect it
One of the best way is to protect your private key never give it out to any one even if it's your mentor that is very important
This is for new guys like me
Of course, because the private key is very important and I think everyone will save it in their own way which they think is safe to do and I don't think anyone wants to share their private key with others, even though it's his own best friend and maybe some of them tell his friend for certain reasons.