How many companies are in the crypto industry?

How can we accurately measure the number of companies operating within the cryptocurrency industry? With the rapid pace of innovation and new startups entering the space daily, is there a reliable way to quantify the extent of this burgeoning sector? Could it be as simple as counting the number of businesses offering crypto trading, mining, or blockchain development services, or does it encompass a broader spectrum, including fintech firms, software developers, and other ancillary service providers? Furthermore, what factors contribute to the growth or decline of the crypto industry's corporate landscape, and how does this impact the overall health and sustainability of the ecosystem?