Amazing response, I am happy with the interest people have shown regardless.
Lots of good points raised, I've been through all of these methods myself but I always had a nagging paranoia compared to how I feel about my bank account (fairly chilled). Now I use an easy solution that makes me feel super secure and generally happier, though I apologise for not directly sharing it - it's something I may want to patent.
I recognise, as many have said, that the current methods are very cheap (which may be difficult to compete with in the market).
Hardware wallets like Trezor are waaay too expensive though.
And let me add to that:
How are they weak?
If you create a paper wallet on an offline computer, then completely erase all data from that computer (hell, even get a cheap old pc and destroy it afterwards),
how is that weak?
Please enlighten me.
I mean that paper is weak because it could disintegrate over time, even from common things like dampness in the house, drying up over many years and disintegrating, a rogue child could puke on it, a rogue teenager could spill beer on it, you could spill beer on it, insects might much it down. Of course when that happens say goodbye to all the money.
Making multiple copies may seem like the solution...2 (still scared), 3 (just about OK), screw it I need to make 5! Now the problem is that there are 5 copies hidden in different places and this brings a completely new kind of paranoia because 5 is a full time job to monitor and it's even harder to know if one of them has been discovered. It's very possible that I could even forget the location of one when there are lots of them and suddenly I have no idea if the wallet is safe or not.
Vires in Numeris