I'm uneasy about the bureaucratic decision that newly-bought US Savings Bonds will no longer be produced as official hard copies.
The Great Wall of China was built to provide security from the Mongols. However, the latter were able to cross it, by bribing the guards.
If the compterized records fail, some people may be left "holding the bag," in Cyberspace.
For further information, google "Gerald Baker war bonds Korea."