Just came across something that's been bothering me since I learned about it. Back in 2022, Sylwester Suszek, the founder and former president of Poland's biggest crypto exchange BitBay, simply vanished on March 10. He was only 34 years old.

He was last spotted at a fuel depot after finishing a business meeting. What's strange is that the surveillance cameras at the location malfunctioned that exact day. Police launched an extensive search, but nothing. No body, no clear leads, just... gone.

His sister Nicole has been on her own investigation ever since, and what she's uncovered is genuinely disturbing. Four days after Sylwester Suszek disappeared, his phone connected to a network near a highway. Then came the messages.

Someone sent Nicole a voice recording claiming to be her brother, but it sounded distorted, almost electronic. The voice said he needed help and demanded bitcoins worth around 12 million PLN to be transferred to an address in an email. Attached to the message was text saying there would be photos of his body within a week.

Nicole didn't pay. But the messages kept coming. More recordings with threats about mutilation, pleas about returning for Easter. The whole thing reads like something out of a crime thriller, except it's real.

What strikes me is how the crypto world hasn't really talked about this enough. A major exchange founder from one of Europe's most active crypto communities just disappears, and the case goes cold. Sylwester Suszek's disappearance remains officially unsolved, and Nicole continues receiving threats while pushing for answers.

She believes her brother was kidnapped and murdered, though his body has never been found. The investigation is still technically open, but after years with no breakthrough, the chances of closure seem slim. It's a dark reminder that crypto's growth came with some genuinely dangerous stories attached.