The ASX200 is set to open slightly higher today as optimism from a recent US trade deal with the UK has boosted global market sentiment. Penny stocks are seen as niche investments offering growth opportunities through smaller companies with strong fundamentals. Three promising ASX penny stocks highlighted in the article include CTI Logistics, Accent Group, and EZZ Life Science Holdings. Meanwhile, Gold Hydrogen Limited, with a market cap of A$117.41 million, is a pre-revenue company focusing on hydrogen exploration in Australia. Despite being debt-free for the past five years and having strong short-term assets, concerns arise due to high volatility, limited cash runway, and management inexperience. The company reported a net loss of A$1.31 million for the half-year ending December 2024, indicating challenges ahead. Overall, the article provides insights into the ASX penny stock market and the specific challenges facing Gold Hydrogen Limited in the hydrogen exploration sector.