Yearn (and defi in general) is so far concentrating on stablecoins that represent the standard of the traditional FIAT world: USD.
In the crypto world, however, the standard is BTC. With wBTC becoming increasingly popular and renBTC finally offering a trustless, decentralised, KYC-free option, I believe it is time to create yTokens and yVaults based on BTC.
Like that the ecosystem could capture fees and SNX rewards from the sBTC pool on curve for example and prepare for further integrations to come (aave, bancor,…).
In addition seamless integration of native BTC to the platform with renJS would open the floodgates for BTC hodlers into defi.
We should start to prepare early to build this BTC-based pillar, because we want to to capture this liquidity!
EDIT1: I follow the good example of pcb3: I am invested in REN and YFI equally, so would love to see win-win.