Adam Back, CEO of Blockstream and HashCash, has said: "Nothing is above Bitcoin, no Central Bank Digital Currency, no stable coins."
He continued that: "I think that blockchains are more about permissionless, uncensorable usage and free market money. I think while it is possible and useful for some use cases, like crypto trading, to have stable coins, they inherently fall short of Bitcoin as they have custody risk, and if there is a central bank underwriting also traditional establishment interests reflected in the operation which may look unattractive to users."
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https://cointelegraph.com/news/exclusive-nothing-is-above-bitcoin-no-cbdc-no-stablecoins-says-blockstream-ceo-adam-backI really don't think there is anything above Bitcoin at the moment, but as of now, we are on the verge of there being a 4th generation of Blockchain technology. Many people say and agree that Bitcoin was the first generation. Ethereum was the second with it's introduction of smart contracts and tokenization. It's arguable but EOS may be considered the third wave of Blockchain generation technology. EOS has delegated proof of stake, which makes proof of work obsolete and EOS scale-able.