About 86 million ETH is held on non-exchange wallets containing enough Ether for staking on ETH 2.0.
Source: https://cointelegraph.com/news/about-80-of-eth-supply-is-qualified-for-staking-says-consensys
About 80% of ETH Supply Is Qualified for Staking, Says ConsenSys
July 17, 2020
CoinTelegraph