According to the Staking Rewards USD value locked in staking approaches 6 billion USD, while the Staking Market Cap (valuation of all projects that have staking mechanism) is currently at 12.2 billion USD.
We have prepared the list of projects sorted by the USD value of the staked tokens. According to the list, the top 7 are Tezos, EOS, Cosmos, Algorand, Dash, Tron, NEM, and Synthetics Network have at least 100M value of USD locked in Staking each. These projects in total have 4.3 Billion value of USD staked which is approximately 73% of all USD value locked in staking.
We calculated the ratio of staked coins to the circulating supply as well. The leaders are Tezos (95.4%), Synthetix (85.7%), Kava(81.3%), Cosmos (77.0%), and BitMax (72.6%).
Note: for Kava and Iris Network we took the ratio of staked coins to the total supply since these projects allow to stake locked supply.