Solana, Cronos, Bitcoin...?
About Solana or Cronos there was no information or official announcement that they are working on it. As for Cardano is on testnet and being audited, the BTC bridge: "Yes we're working on it. An asset transfer bridge is not difficult. The hard part is how to enable Bitcoin users operate Nervos dapps like we enable Ethereum users. Bitcoin lock is already done, but there's no standard dapp interface (like web3.js on Ethereum) on Bitcoin, we haven't found a proper solution here. If there's no progress at bitcoin side we'll try to move forward in our way. I think it's good for all UTXO chains."
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