Falling a staggering 78% since this time last year, shares of Plug Power (NASDAQ: PLUG) have performed miserably in 2023. The fuel cell and hydrogen stock has fared even worse over the past three years -- a period during which it has plunged 87%.

But there are still those who believe Plug Power's best days lie before it. For these undaunted optimists, in fact, the stock's current price tag might even seem like an excellent buying opportunity. Let's look at some important points that prospective investors must appreciate before choosing to plug this stock into their portfolios.

For years, bulls have held fast to the belief that Plug Power's success was just around the corner. The company was growing revenue at a rapid clip, and management hinted that profitability would soon follow. Now, however, those same investors have removed their rose-colored glasses in looking at the company's future.

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Source Fool.com