Vitalik Buterin sold 5,000 Dohrnii (DHN) tokens for $124,000, which led to a 50% drop in their value. The tokens were received for free from Dohrnii Labs. Buterin had previously warned projects not to send him tokens, but to donate to charity. Dohrnii Labs offered to sell the remaining tokens over-the-counter to avoid further price fluctuations.