Cathie Wood'sARK Innovation ETF(NYSE:ARKK) was once the darling of the market, boasting bold bets on disruptive technologies and promising massive returns.

Yet, over the past five years, it's been more like a rollercoaster with no brakes—compared to the smooth ride offered by theInvesco QQQ Trust(NASDAQ:QQQ).

So, what went wrong? Let's dig into why ARKK has stagnated while the QQQ soared.

High Hopes, Hard Falls

ARKK made a name for itself by investing in what it called "disruptive innovation." The fund's top holdings includeTesla Inc(NASDAQ:TSLA),Roku Inc...