Great letter John. Thanks for getting me on the crypto road. Its got me fired up and looking forward with great anticipation of the next 40 years. The possibility of personal wealth and a united planet solving issues as a peaceful collective of people because we share the same currency. In regards to your concern about governments creating their own coin you seem to have hit on the fix. It would be a fairly easy target for other governments to attack, pump and dump, all the nasty collusive activities that hurt its value. They might have to use the Steem coin method of power up and power down to protect it.