A total of 312,000 validators together stake 10 million ETH on the Beacon Chain. This $25.8 billion worth of ETH represents 8.3% of the total circulating supply.
Such a high share of the total circulating supply staked indicates that the confidence in Ethereum's long-term future is high. In addition, the current yearly staking reward of 4.81% has likely also contributed to attracting ETH holders to stake their holdings to earn yields.