yeah, the problem exist. Maybe answer is testing your ideas (promo text) on your potential users (you can start with friends (non-professionals in crytho)) and if they understand you - congrats, this material is good.
Almost cryptho ICO companies telling everything about "unique" technology, blockchain algorithm, but nothing about customer life value, why this innovation so important, when they can use it. Understanding who are your audience, when and how your product really can help them - base on which you can write really good promo.
I agree. The best press release is one that is not too long, gets the main message out in a way that a wide audience can understand, and has contact information where people can refer to the website, etc. if they want more details.
Look for examples in other businesses. The ones that you think are most readable to you are probably the best ones. When I write a press release, I usually start with two or three bullet points and then expand those into short, succinct paragraphs. Wrap it in a quote from someone involved, contact info, and a bio paragraph at the end, and that's a pretty good formula for a winner.
Best of luck!