According to Lookonchain, traders should be cautious about meme coins promoted by well-known accounts. Recently, a hacker compromised McDonald's Instagram account to promote the $GRIMACE token. The hacker used 24 insider wallets to purchase 705 million $GRIMACE with just 65 $SOL and subsequently sold them for 5,202 $SOL, netting a profit of 5,136 $SOL (approximately $738,000), achieving a 79x return.