Can this support custodial smart contracts, MPC (multi party computation) wallet on the native chain and the bridge to any layer 2 with brc-20 and runes support. To make brc 20 mirrored on the btc2, like create a support for any brc20 / 420 through locking the assets into a smart contract and issuing a wrapped token to traded them on chain. Also native staking and create the market for all them tokens, btc-style. That should be easy.
BRC20, runes and smart contracts on the BTC chain, and therefore BTC2 are wasteful IMO. That's what Ethereum, Solana etc. are better suited for. BTC2 can't aim to be everything IMO, but anyone who wants to work on such support on their own can.
BTC2 was created for payments and with the idea that no L2 is required for it, and that's true regardless of how popular BTC2 becomes so long as BTC2 doesn't have such complicated transactions.