The wallet seed is the life of the wallet, so these seeds should be stored in a place where they are never lost. My advice would be to note the wallet seeds on paper and store them in a very safe place and discuss this wallet seed with a trusted family member so that if one forgets, the other does not forget and so that at any time they can save these wallet seeds and activate the wallet again.
And if you don't do everything to protect the wallet you will not enjoy the benefits of that wallet, because I have heard some wallets use that there is no good wallets in the internet to download. Even though you download the most safe wallet on earth and you don't know how to make the seeds phrase safe, it will make you to loose BTC that will make you to hate all the wallets in the internet.
The safest place to keep your seeds phrase just write them down in your inner room, because you have the keys in your inner room which anyhow person cannot enter. I don't know about other people but my inner room is a safe place were only me and my siblings can only have access..