According to the StakingRewards, the Staking Market Cap (valuation of all projects with a staking mechanism) is currently at 375.6 Billion USD.

We have prepared the list of projects sorted by the USD value of the staked tokens. The list shows the Top 5: Ethereum $ETH, Solana $SOL, Sui $SUI, BNB Chain $BNB, and Lido Staked ETH $stETH.

$ADA $wstETH $TRX $HYPE $AVAX $APT $BTC $EETH $WETH $WBETH $DOT $OM $HBAR $TIA $NEAR $LBTC $TAO $TON $rsETH $ATOM $USDC $SEI $CRO $rETH $CBETH