While there is undoubtedly a huge potential market, the business has no sales and is fast bleeding cash. There are significant capital expenditures required as the business builds out its infrastrcuture and funds its R&D.
Their product, while requiring regulatory licensing, is essentially a commodity. Easily cultivated, fast growing and largely undifferentiated, with any growth in demand easily able to be met by a rapid and significant global supply response.
Very speculative, early stage business trading on the promise of an industry that may (or may not) develop as hoped -- buyer beware