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?
This is the price of WBTC versus the price of Bitcoin during the last year. Do you think that this currency is really locking Bitcoin 1:1, or is it closer to being a stablecoin whose price is linked to Bitcoin, but the difference here is that in the case of the dollar, there is a difference of a few cents, and it was at the level of 30 thousand $ is not noticeable but the difference of .001 Bitcoin would be significant.
All of these currencies will end up closer to what happened with Luna, so no one knows what will happen when the price of Bitcoin rises and everyone wants to sell. your best options currently are CEXs and we have a good list ---->
https://bitcointalk.org/index.php?topic=5461920.0