The Third Party Doctrine in the US

There's a principle called the third party doctrine that I've especially been following a lot in my newsletter when it comes to privacy protection and transparency with fintech apps including some that have to do with cryptocurrency. In general it gets applied to instances with businesses basically says that if you give your data to a third party you have a decreased or in some cases no expectation of privacy anymore because you have like surrendered that privacy to someone else. So what scares me about I haven't seen whether this has been applied anywhere but I am afraid of the idea that if you have these devices in your house that at some point someone's going to make the argument that because you have you know surrendered the privacy of