"My bitcoins are stored in our safe deposit box, and my son and daughter are tech savvy. I think they're safe enough. I'm comfortable with my legacy."
Interesting thought: Since those bitcoins were part of the first transaction, and since the transaction history for those coins would be saved and hence documentable, is it possible that those particular coins might become "collector's items"? And perhaps "worth" more than the "face value" of 10 BTC, to the right collector?