So since RenBTC is not a real bridge and WBTC is centralized due to BitGo, the only safe way to do this would be to immediately sell the wBTC for ETH and hold that on the ETH chain? Or some other stablecoin?
If you believe in ETH, hold it is best option because stable coin is risky even it is Tether USD (USDT).
With stats from this
ultrasound.money/, I feel very positive about Ethereum in a next bull run and it will have better profit than Bitcoin. First ETH is promising for profit. Second stable coin is risky by depeg. Why you don't simply hold ETH?