No I don't, and that's not how certifications work.

The message we're sending is that people who are able to answer these questions in a restricted time-frame DO have the minimum knowledge required to use Bitcoin properly.

Like with any industry, certifications are not black/white between people who know/don't know about a subject. I come from the information security industry and I know many uncertified professionals who can run circles around certified professionals with their knowledge and experience. You don't need to have a certification to be a good security professional, and you don't need to have a CBP to be able to use Bitcoin.

That said, certificates do prove that you have a minimum level of knowledge. In the security industry, there are many jobs which require at least a CISA, CISM, or CISSP certification before even being considered for the position. Speaking with these HR personnel, they understood fully that there are many candidates out there who would fit the role perfectly despite not having one of these prerequisite certs, however it takes too many resources to risk that role on someone who wasn't certified. What if they seemed good in the interview but didn't actually know what was necessary? The HR paperwork, the month of pay, and the on-site training in the company's procedures would all go to waste while they resubmitted the job description and resumed the hunt for another candidate. By requiring the certificate they knew in advance that the candidates had the knowledge without spending a month to figure that out.

Finally, like with all certifications, they're not for everyone. Many people believe in certs, and many people think they're a waste of money and time.
C4 was built to establish these minimums in our industry in a not-for-profit way. If someone or their business doesn't have a need for measuring knowledge against these minimums, then they don't have to use it; C4 is here for those that do.