according to me storing the private keys offline is the best way you will be completely fearless and relax if you're computer got crashed than also no issue.
Proof of joined post Bitcointalk username:globalking Campaign: Facebook &Twitter Facebook URL:https://www.facebook.com/globalking9 Twitter URL:https://twitter.com/globalking9 Eth Address:0x485e012dcc4f04431b5365897978fbad450cab63