As others have said, you'd need to check your insurance re what you're covered for ie how much cash (usually limited amount of £500ish) and location of safe (usually at reception)
Am sure I've seen it on here somewhere that
ICR can provide safes at the going rate too - Admin will be able to confirm
As for us.....only take £s in cash, leave it in reception safe & change at supermarket each night or failing that we just pay in £s as we go
'spose it's pretty much what you're comfy with