The world of penny stock investing is full of wild promises and speculative punts. But every so often, a genuinely intriguing opportunity emerges. One with real assets, a credible thesis, and explosive upside potential. And Helium One Global (LSE:HE1) might just be one of them.

At only 0.6p per share, it’s trading for less than a penny. And for investors with a strong stomach, the bull case is quite compelling.

What does Helium One actually do?

The company is a primary helium explorer, with its flagship asset the Southern Rukwa project in Tanzania – one of the most helium-rich geological formations ever identified.

Why does that matter? Well, helium isn’t just for party balloons. It’s a critical industrial gas used in semiconductor manufacturing, MRI machines, particle accelerators, and fibre optics. More crucially, these sectors are growing rapidly and have almost no substitutes for the helium they need.

In fact, earlier this year, Helium One completed a major pumping test at its Itumbula West-1 well, achieving helium concentrations averaging 5.4%, with peak readings hitting 9.2%. For context, a helium concentration above 0.3% is generally considered commercially viable, making these figures exceptionally high by industry standards.

As chairman James Smith noted following the test results:

“The testing delivered consistent and reliable operational performance, with ESP flow rates exceeding expectations and sustained helium concentrations in line with anticipated ranges.”

The company’s now seeking an industrial partner to help fund the next phase of development, which is a significant vote of confidence in the project’s viability. And beyond Tanzania, Helium One also holds a 50% working interest in the Galactica-Pegasus helium development project in Colorado, adding further optionality to the investment case.

Is the opportunity as cheap as it looks?

Here’s where things get tricky. Despite the sub-penny share price, this stock is far from risk-free, and ‘cheap’ is relative.

Helium One has yet to generate any meaningful revenue, and the path to commercial production is long and expensive. The company is actively seeking external funding and a farmout partner, which means shareholders face real dilution risk.

More critically, the enormous resource estimates are based on geological surveys and well tests, not confirmed production. If future drilling results disappoint or partner negotiations stall, the share price could fall sharply from here, potentially even collapsing to zero.

But is this a risk worth taking?

The bottom line

Personally, it’s still too early in Helium One’s journey to add any shares to my personal portfolio. But there’s no denying the obvious appeal.

For adventurous investors who understand that this is a high-risk/high-reward bet, Helium One presents a genuinely credible opportunity. The underlying commodity’s in high-and-rising demand, the geological evidence is encouraging, and the share price leaves plenty of room for explosive upside if the projects deliver.

The key question is whether management can secure the funding and partnerships needed to turn this potential into reality. And that’s exactly why I’ll be watching closely.