Sovereign citizen movements are a figurative cancer on society. The apparent rise, is an artifact of visible social media engagement and the news cycle. In reality, their attempts to avoid taxation and law founder pretty much as always, and they have no more credibility now than they did when people first proposed these theories.
Ask any lawyer. They're tired of dealing with mentally ill people who believe writing their NAME, A SOVEREIGN CITIZEN somehow magically changes their status in law.
To be charitable to your meaning: are there relatively more people displaying this belief? Yes. Are they going to succeed in construction of a new polity and legal structure around their conception of law and society? No.
There is certainly more of a trend toward the sovereign individual than at any other point, curious why you don't think it's possible?