I read that one of the best ways to preserve a seed phrase is to write it on a piece of paper and keep it in a safe place... Somewhere safe could be in your home out of the reach of family members and friends, it could also be a safe deposit box. But not everyone are financially buoyant to afford the services of a deposit box.
I believe we must have seen or heard about fire outbreaks, where buildings are completely erased by fire. Imagine if the owner or occupant of such a building has some Bitcoin assets, and has his/her phone, tablet, laptop and the seed phrase piece of paper in the building and everything was lost to fire. Now, this brings me to the question... Can seed phrase be memorized? It's advisable to memorize seed phrase?
No, it's a bad idea because, over time, our memory will forget some things, and if you accidentally forget your seed phrase, you will lose all your bitcoins forever. If you are afraid that writing on paper may burn in fire, you can copy us into different copies and for convenience use a USB and store them, and keep them with you or somewhere only you know. With 4 copies, 3 paper copies, and 1 USB I think it will be safe.