how can I cold storage IOTAs?

Remember your seed. That's all - so simple

Will we ever be able to use more than 81 characters for our precious seed?

Dude, do the math. How many possible seeds exist with 27 chars, 81 length?

SO umm, yes then?

My point was: Noone will ever need a seed longer than 81 chars.

Hmmm. Some time ago I was told:
"No one will need more than 637 kB of memory for a personal computer"

how old are you?

in 1981 I was 15y ...