Is there a totally bulletproof non-hackable cold wallet or do all of them have some sort of weakness?

Been on the hunt for the most ultra-mega-giga secure cold wallet but the more I read the more I noticed that none of them is actually totally safe against everything. There is always some kind of weakness that could get exploited. I myself have a ledger nano but I want to see if I've missed anything and if there is a cold wallet that is unhackable or where there is a risk of you losing your assets.

Thanks guys