From my Cousin the Firefighter... "PLEASE, keep them on the first floor!" :loud: The last thing a firefighter wants is to get hit in the head by a heavy safe full of coins when he's trying to save your house.
Put all the Chinese coin fakes and the fake Chinese Rolex in the safe and put the real coins on the dining room table is another option.
Nitrates/nitrites Ok. In a locked box, by the outhouse, buried in the copperhead pit. The others get toned with nitrates in a controlled environment, in a locked box inside a locked box inside a locked house with a dog that will lick you to death but barks enough to wake up the dead.....unless my H&K decides otherwise.
I have several storage methods. Some of the coins are in 2x2 cardboard slabs in a cardboard storage box or plastic sleeves in a binder. Some of the coins are in coin books. Some of the proof sets are in drawers and inside a zip lock bag. Some of the proof sets are in the mint cardboard boxes but also in a zip lock bag. Some of the coins of little value are just loose. Guido protects the whole lot. Unless you like broken digits, don't come knocking!
One thing I have been wrestling with as I build my collection (from childhood) is, when I buy coins I did not have in my books when I was a kid, I don't want to put the newly purchased ones in the old books. For two reasons. One the new ones always come in a frame and two, since they are a semi or keys, I don't want them to get damaged. I had not though about binders as Phil Ham suggested. I like that idea.