As the niche offerings via etf's continues, one is able to build their portfolio with a mix of the more traditional equity active managed funds, indexes and add etf's if desired, to establish their equity portfolio.
The below link is for information only and provides pieces of understanding regarding the so-called disruptive sectors now in place and how some of these will affect our society and investments. Many of these disruption channels are already in place, many; out of our sight.
As you scroll down to read, the page will continue to fill; so there are numerous pieces to read.
Hopefully, you'll discover some more knowledge about these sectors and some of their holdings, whether you use an ARK fund or another sector offering.
NOTE: The linked write is sponsored by ARK. Whether your're biased or not against ARK, its management, its style or the holdings; hopefully your cranial cells with be stimulated to a point of value for you. ETF Trends article