Plug Power's stock price has collapsed more than 95% from its all-time highs, is this an opportunity to get in on the cheap or a sign of risk? Plug Power bills itself as "the industry leader building ...

Plug Power aims to establish itself as a key player in the green hydrogen market, which could be a $1.4 trillion market by 2050. In January, the company closed on a $1.66 billion loan from the U.S.