BTC is controlled by the miners. They can simply increase transaction fees at will, effectively creating inflation that obviates BTC's 21M token limit. During the peak of the 2018 moonshot, xaction fees reached in excess of 25%.
Paying 25% to move your money is not sovereignty.
Private cryptos, bespoke, one-time use cryptos, those might be sovereign if you can use them over a mesh network that can't be censored and is utterly decentralized consisting of users that are nodes and supplying electricity to run that network themselves.
BTC is dependent on miners, censors, power companies, and governments everywhere to provide necessary services today, which means your tokens are privileges they allow you to have.