Pepe Coin (PEPE), a meme-based cryptocurrency, has experienced significant volatility and a decline in value due to several factors:

1. Profit-taking by long-term holders: On-chain data shows that long-term holders have sold their PEPE tokens, leading to increased selling pressure and potentially a 35% price drop. 

2. Security incidents: PEPE has faced security issues, including the hacking of its official Telegram channel, which has diminished investor confidence and contributed to the price decline. 

3. Market sentiment and competition: The emergence of alternative meme coins has diverted attention and investment away from PEPE, affecting its price performance. 

These factors have contributed to the recent underperformance of PEPE in the cryptocurrency market.