Does Monero not have a market price? I fail to see how this applies to Bitcoin but not monero 

Do Monero users not make purchases based on the current exchange rate?

Are you asserting that if you participate in the market you are therefore not sovereign?

But to answer your question directly, I am sovereign because I hold my own keys and I broadcast my own transactions and I audit the supply of coins without any third parties, using node software I've selected. If Bitcoin core updates to a new version tomorrow and I don't like it, I am not forced to use it