How much harm do you think a Binance implosion would cause Bitcoin?
I think Bitcoin will be affected in a short span of time, we can consider the impact of Binance the same as FTX. It will only short live as the Bitcoin traders are already used to this kind of scenario. Trader can just find other exchanges and continue trading.
Is the US a big threat to the coin market?
The US is one powerful country so I think the US going southward to cryptocurrency will be considered a threat since if they are serious enough they can give a huge blow in cryptocurrency operations by regulating centralized services and going after Crypto activities in the name of illegal things such as money laundering, fraud and scams.