Hyzon Motors, which some people call the "Tesla of Hydrogen Gas", might be among the most speculative companies that I am aware of in the market today. The company's ultimate goal is to replace polluting diesel-powered trucks and buses with environmentally friendly hydrogen fuel cell powered solutions. The financials from Q3 2021 were ugly, as the company only earned $1 million in revenues, with $50 million in operating expenses. This is a very early-stage company.