ARK funds are about 1.3% of my brokerage account and have almost tripled in value since late 2019/early 2020 when I built the positions. Around a year ago, when ARK funds were on a screaming tear and people were amazed, I cautioned that, over time, funds like ARK's can only be expected to grow in the neighborhood of 15%/year.
What matters is not the performance of a few months but that over years. ARK funds have been wildly outperforming my expectations and I'm upping my long-term expectations to 20% or more annually, averaged over longer, multi-year periods, regardless of when one enters the position. Those who entered earlier could see much higher returns. I'm basing this on the strengthening of my thesis that the world economy will benefit greatly from the transition from the industrial age to the age of technology and new technologies will garner the bulk of the gains. But investing takes time.
I would never take a large position in such funds (although I think most individual investors might be well served to own such funds in place of market indexes) and 1.3% of my portfolio is not very significant. Personally, I took the positions just to force myself to have a stake in the hopes that I could take a larger interest in some of the individual components of the funds (besides TSLA,, LOL). I don't need to own ARK funds in order to do this (ARK holdings are published for all to see) but I've found that having a stake, no matter how minor, can help stimulate a lazy investor like me.