There are currently many layer2 technology solutions on BTC
1. BTC side chain
2. utxo plus client verification based on utxo
3. taprootconsensus is based on taproot
4. Rollup technology (representative chain taprootchain)
5. Multi-sign and add evm (Merlin’s route)
6. Lightning Network
7.rgb
Which solution do you prefer among the many options?