The answer is yes, the United States government has the legal authority to confiscate gold. And while this may seem an unlikely action today, recent events which include the housing crisis of 2008 and the pandemic of 2020 have spurred economic distress in the US have reminded those who own gold that such a possibility still exists.
Many people think of block chain as the technology that powers Bitcoin and while this was its original purpose, blockchain is capable of so much more. Despite the sound of the word. There's not just one block chain. Blockchain is shorthand for a whole suite of distributed ledger technologies that can be programmed to record and track anything of value from financial transactions to medical records or even land titles.