Dave Collins.

An alleged kidnapping in New York is the latest instance in which authorities say cryptocurrency-related crimes have involved real-world violence. Kidnappings for ransom in France have rattled the crypto industry there, including one where a crypto entrepreneur’s father had a finger cut off. Experts believe the increase in violence could be linked to cryptocurrencies’ surging values, violent groups adding crypto thefts to their repertoire and the ease of shielding your identity in crypto transactions. “Things that might clearly be outside of social norms in other spaces — like robbing a bank — are somehow just part of the game here,” said John Griffin, a finance professor at the University of Texas in Austin.