sigh story is good but he's too shut in and afraid it's correct there's always sky beyond sky if he's afraid of potential danger he's not fit to cultivate. and yeah even if he's reached peak mage is there any gaurenty there's no one's stronger than peak mage so he still cultivate in cave hiding till he dies. is it any different than being mortal and die without worries why need to get strong. since both paths end up as no one knowing if he's mortal r god.
Riimuru:Hell make a move eventually, either someone attacks the library or he cant sign in there anymore and leaves, just might take awhile