How many people own the black card?

Could you elaborate on the ownership structure of the so-called "black card" within the cryptocurrency and finance industry? Specifically, how many individuals or entities are believed to hold this elusive and potentially highly-privileged card? Given its potential significance in accessing exclusive services or benefits, it's intriguing to understand the scale of its distribution. Additionally, are there any publicly available data or insights that could offer a glimpse into the demographics or characteristics of these cardholders?