On September 6th, according to data tracked by blockchain security platform Arkham, a cryptocurrency user attempted to exploit arbitrage strategies involving MEV (Maximal Extractable Value) robots and flash loans for what's known as a 'sandwich attack'. This tactic typically involves inserting one's own transactions before or after a targeted trade, to manipulate the price differential and gain profits. In this case, the user mobilized $12 million across 14 trades with the intent of realizing arbitrage. However, after completing the transactions and accounting for necessary gas fees, the user ended up with only $20 in profit, illustrating that the actual profitability of such high-risk strategies may fall far short of expectations.