The actual adoption rate is not so high, since nearly none of the business initiatives accept payments directly in BTC. This makes exchange hubs (ruled by the world's main banks) "owners" of bitcoin. They create its value by controlling fiat-crypto exchange rate. This brings a really serious drawback: de facto centralisation of presumably decentralised project. Moreover, in this situation, the "owners" of BTC and "owners" of dollar (and other fiats) tend to be the same structures (worlds main banks and worlds richest tycoons). This is a serious drawback, which, I hope, will be somehow eliminated in some time.
Exchange owners do not "own" BTC, they only own the BTC that their customers deposit into their platform, that's why we keep telling people to only hold BTC in their self custody wallet. BTC's value cannot be controlled by any institution, it is decentralized and is value is controlled by everyone who uses BTC, the BTC community controls the value because they determine what the demand is. BTC is fully decentralized, there is no de facto centralization, exchange owners have no control that exceeds what goes on in their platform.