Gold-backed digital assets aren't safe in my point of view, because they require continuous audit. What if backed asset is no longer fully backed by gold and hidden inflation occured. Digital asset creator become richer while holders suddenly become poorer. Centralized assets all have point of failure, because someone is issuing them almost with no cost, with no skin in the game. Unlike all centralized assets backed by something precious, bitcoin is backed by pure energy that has cost by default, there is no way to get energy without hard work. Who has done more work recieve the right to issue new bitcoins, there is no free way to print them.