Well You missed #DYOR and not listening to bloggers
Op might just be fishing merits. not much proof but op's post is more of the work of an Ai than his claims here (though all these are common knowledge for most people here, just the pattern of pf arrangement seems off). Search for the term using any ai Explain in detail, what is a bitcoin wallet and how to use it and you will get a similar design of ops post same pattern of arrangement... Just little tweek from his end. 
Well aside that, if what op claims is true then he also has to tell his friend that investing in Bitcoin without proper knowledge on how to secure it is risky. And his friend should try to make his own research before using his wallet. I don't think he had some plans with it in the first place. If not he would have made some research himself.
I don't think it's a good idea to regularly backup your wallet because there's a risk someone will find your backup. One copy is enough, but if you want multiple copies, make sure to create a wallet with an extra word or passphrase as an extra layer of security. Make sure the passphrase is not included in your seed backup so that if it is compromised they cannot find your exact wallet. Two or three backups should be sufficient. As they mentioned, make sure to advise your friend to have a seed backup on the piece of paper.
It's mostly likely the best practice to have more than one backup of your seedphrase. That's because just a copy can be lost to physical damage. For example haven written your seed on paper and then after a long time the ink starts to fade off. You don't even have to worry your self much as you have other copies kept somewhere. You just have to make sure you keep these copies in places that are hidden and not know by anyone but you. Also places that aren't prone to natural disasters..