Well ARK hat a terrific run last year, but this is mostly due to the bull market and increased inflows. Sven Carlin made a video where he argues that since ARK mostly invested in small cap, each inflow would increase the stock price.
I am subscribed to their daily trade notification and have noticed that since their extreme inflows in November/December they started to invest into much bigger companies whereas before they were much smaller.
Personally while Cathie is skilled and I enjoy her outlook videos - I think that over the long run they will under perform the market - just like most innovation, future or whatever they call themselves funds do.