To store bitcoin, I print 4 copies of heavily encrypted paper wallet and store it in 4 safe different locations. Its almost impossible to lose my money to a thief too, since the encryption key is only in my head and my fiat bank deposit box.
I think this method is the safest method of storing bitcoin, though it can take some time to spend it, so I would only recommend it for cold storage, such as savings or funds to be spent on a later date.
I only use only one wallet for the main time because everytime bitcoin is received, I immediately converted to fiat currency used in my country and cash out to trusted bank recommended by the online wallet site. For now that method is still the best and maybe the right time to hold is not yet ready for future plans.