So I'm not completely comfortable with having my seeds stored on paper in my house. I'm no more comfortable than I would be having a pile of cash stored in a drawer. I was wondering if this would be safe, or safer?: Take an old iPhone, disconnect it from the internet and store the seed in a password protected app on the phone? At least if someone found it, they would have to get past 2 more security levels (the fingerprint unlock and then the password app code). Knowing that the phone in the past has been connected to the internet, would it be safe if I turned off the wifi? I figure once BTC passes $50,000 my paranoia will be such that I'll probably get a safe deposit box. What do you think? Safe? Would it be safer than a password protected USB stick, if there is such a thing?
in this scenario, i'd be more concerned about device/hard drive failure than anything else. you would definitely want to back up your seed on multiple devices, then encrypt them. and then you would probably want to keep them in different physical locations -- places where you are sure they won't be stolen and picked over. e.g. your house, your mom's house, your work desk, locked in a drawer.
there are password-protected USBs and hard drives but they generally use pretty weak encryption. there are no great answers here. paper copy in a fire-proof safe with two encrypted copies of the wallet on USB, etc. stored in two different trusted physical places is how I roll.