According to Lookonchain, traders should be wary of meme coins promoted by well-known accounts. Recently, a hacker breached McDonald's Instagram account to promote the $GRIMACE token. The hacker utilized 24 insider wallets to purchase 705 million $GRIMACE with just 65 $SOL, later selling them for 5,202 $SOL, netting a profit of 5,136 $SOL ($738,000), which is a 79x return.