The article discusses the increasing potential in the hydrogen market, as evidenced by the rise of cheap hydrogen stocks like Plug Power, which received a $1.66 billion loan guarantee from the U.S. Department of Energy. This financial boost has validated the vision of Plug Power's CEO, Andy Marsh. The sector is also awaiting potential easing of tax credits and could potentially tap into a $410.6 billion market opportunity. Apart from Plug Power, other top cheap hydrogen stocks highlighted include Air Products and Chemicals, which has seen bullish analyst ratings and growth potential, and Ballard Power, which secured significant orders for its hydrogen fuel cell engines and received grants for a Gigafactory. Analysts are optimistic about the growth prospects of these stocks. Additionally, the article mentions the Global X Hydrogen ETF as a convenient option for investors to diversify their portfolio with hydrogen-related stocks, showcasing confidence in the sector's future. Market projections hint at a substantial growth potential for the hydrogen market, with estimates suggesting a $12 trillion market value and a doubling in global hydrogen demand by 2030, particularly in Europe. The overall sentiment of the article is positive, underlining the growing interest and potential in the hydrogen sector for investors.