When Ethereum finally becomes the biggest blockchain by market cap 0xBTC will become the BTC emulation that is used as a deflationary store of value on that blockchain.
Bitcoin will die and cease to be a blockchain of any importance and people will switch to investing in 0xBTC which is compatible with the Ethereum network.
Yes, OxBTC will be very potential in future but I do not think bitcoin will die or it will beat bitcoin because I believe bitcoin will also improve on its system and it will continue to rise and remain the most valuable and most potential coin in crypto because of the strong team behind it.