Is mutual fund investing the safest way to invest from identity theft?

Since etf/stocks trade on the market, your brokerage account can technically get hacked and then someone can instantly sell stocks and place a limit order with a very unfavorable price for another stock. They can essentially steal your money that way.

However, with mutual funds, the transaction occur after the market is closed, and usually settles the next day. So if you are checking your account daily, and see no unusual transactions prior to 4 pm everyday you are good.

Am I correct?