Thanks @tomshwom. I appreciate this response and you make many good points.
"so they can and should allow trusted 3rd parties like exchanges manage their funds."
Very true. The sooner that we, as blockchain developers, can simply the secure handling of private keys for the layperson, the more rapidly crypto will become mainstream. I think future economy is really going to be technology and information based so those who don't learn these simple skills will be left for the lions.