The story of Kiarash Hossainpour is somehow a warning that keeps repeating itself in the crypto world. This 22-year-old German of Iranian descent became a case study of how quickly you can lose everything when you become overconfident.

Hossainpour was born in 1999 in Berlin, as the son of an Iranian family who escaped the Islamic Revolution. His father, a computer scientist, gave him his first computer at age ten—with an important condition: if he wanted to make money with it, he had to learn to program first. He did that. At 13, he started his YouTube channel, initially with gaming tips, then with WordPress websites for small money. In 2014, his first Bitcoin payment came in, and his brain started working. A fully virtual currency, decentralized, community-driven—that was what he was looking for.

At the end of 2015, he took the big step: nearly 40,000 euros in Bitcoin. His parents asked if that was legal, if it was "real" money or a scam. His father told him, "The most important thing is to be careful. These millions are just numbers on a screen." But Hossainpour used his growing numbers as proof of his success. The YouTube channel actually gave sensible tips—"Only invest what you can afford to lose"—but the photos showed him in a Rolls-Royce, in a Lamborghini, smoking Cuban cigars. A very surreal story.

Then came the crash. In spring 2022, the crypto market collapsed. Up to 90 percent of his digital portfolio was gone. But that wasn’t even the worst part. Luna, the cryptocurrency he had bet on with messianic zeal on his channel, lost 99 percent of its value. That was the real knockout punch. Hossainpour blamed the incompetence of the Luna team but admitted he didn’t see it coming. His "sixth sense" was atrophied.

What’s remarkable is: he didn’t give up. He told Business Insider that he would continue investing in Bitcoin. "Accumulating losses is part of the game," he said. He sees himself as a "strategic investor," someone who doesn’t panic sell. Bitcoin is now traded at about $77,500 per unit—far from the all-time high of over $126,000 it reached in 2021. Still, Bitcoin remains the most stable currency he has invested in.

But the whole story also shows: when you are an influencer with hundreds of thousands of followers giving financial advice, you bear responsibility. Critics like U.S. stock advisor Clark Howard called him "irresponsible" because he could have driven thousands of uninformed people into bankruptcy. That’s the other side of this story. Hossainpour’s background and his path to success were impressive, but the lesson here is: even the best investors can be wrong, and those who follow others must understand that no one can truly predict the market.