1. Bitcoin already exists. Use it.
2. I agree about email. it's trivial to forge. johnmostrowick.blogspot.com/2016/01/why-email-must-go.html
3. Privacy is important - don't mistake that. Sometimes you do need to tell someone something without them knowing who you are - anonymous whistleblowing on crime, corruption and abuse, for example. If you destroy anonymity you stop not just the Snowdens, who you might be against if you're right wing, but you also stop abused spouses from speaking up, gay people who are being abused, kids being abused at school who need to report the abuse, etc. Anonymity and privacy are critical.
4. What we really need is distributed services. I'm predicting a P2P internet and the death of the server room.