Layer-1 blockchain Polkadot is the most popular network when it comes to staking. According to The Block Research, nearly $3 billion worth of DOT, Polkadot's native token, are at stake.
The figure means DOT token holders have deposited $3 billion worth of funds with Polkadot validators for earning passive income. Cardano follows Polkadot as the second most popular network, with $1.79 billion worth of ADA staked.
Tezos (XTZ) and EOS are ranked third and fourth by staking value, each having roughly $1.4 billion within their networks. Overall, around $12 billion in total is staked across the top ten networks — eight of which are Layer-1 blockchain networks — except Band Protocol and Synthetix.
Source: Staking Rewards, The Block Research
Besides being the largest network by staking value, Polkadot's DOT is the only token to have a positive return in the U.S. dollar, bitcoin, and ether over the past 90 days since the network launched trading of the token.