If I leave cash on the street should I expect it to be safe?  Is that a deep security issue?<p>You implied there were deep fundamental flaws in BTC security, but your response shows nothing of the sort.  Your &#x27;deep flaw&#x27; is &#x27;you have to protect your private keys&#x27;.  You are describing a UX flaw, and I would agree with that.  Objectively, you have exposed no &#x27;deep security issues&#x27;.