To be really technical, briefly, the way I conceive of it:

Freedom is the measure of adherence to the NAP.

Power is the measure of how much you influence the market through your actions, for better or for worse.

You can gain in power while losing in relative power, and this is what is to be expected on a free market when an incumbent but still profitable private company is outcompeted by an innovator. The incumbent may still be earning bitcoin, let's say, but they are mostly stagnant while the innovative company takes market share. Both are gaining influence in the market, in their personal lives, in the realm of physics, what have you. The incumbent may even start losing bitcoin on net but at a rate slower than the appreciation of the bitcoin's purchasing power, or in such a way as to permit the happiness, social influence, or influence over the physical world of the owner to continue to increase. The innovator might even actually be many small companies, thus decentralization does not eliminate power, but furthers it, while simultaneously restricting its use as regards the control of another person.

So freedom is not the degree of absence of power. Freedom is the power to do nonviolent stuff free from violence.