Pros & Cons
-Hackers can't steal your seedphrase if it's not online.
But thieves can -Offline storage methods like metal plates and paper wallets can withstand a lot of wear and tear.
Secure But like fire & other things gone a damage it-You're the only one with access to your seedphrase.
If another person find it , You loseDo this 
-Make multiple copies of your seedphrase and store them in different locations. (Or sites , notes , encrypted sites.)
-Use a durable storage medium, such as a metal plate or paper wallet.
-Choose a storage location that is safe from fire, water, and theft.
-Do not share your seedphrase with anyone.expect friends