icloud keychain

I upgraded to Sierra on the mbp and was asked to enable icloud keychain. Is this worth doing?
We are not on twitter, facebook or linkedin - not sure if that matters re-security. We don't use icloud for anything either. We have an imac, mbp and ipad 2 mini and we mainly use firefox.

Thanks,

via ehMac.ca http://ift.tt/2f9tMAE