The only problem is it has to be done right. Say you use a newer printer and it's compromised.... you could lose it through there. Rare yes but not impossible. The dumber the printer the better, also if you print a wallet might look into how to clear cache on your printer.
Power it off?
I dont know about you guys but I have a normal printer that prints only. Not with wireless crap and other stuff that has attack vector.
I just power off the printer, and the cache clears, because it doesnt have memory card and things like that.
Also storage of that paper wallet is key. Best is stored on a piece of paper in a place such as a bank safty deposit box. Don't upload it to the clouds or anything or you defeat the entire purpose of it.
Wow storing it in a bank, how logical is that.
We all use bitcoin because we dont want to use banks, but theN you say just put the access to the bitcoin wallet into the bank. That makes sense....