Is it even worth it to have risky ETFS if you only have them for small positions or is it better just to buy stocks?

So, most of my nest egg is in VT, but on the side I also have small positions of QQQ, EMQQ, and ARKK because I believe in these funds. However, since they are so small, I’m wondering it’s it even worth it to hold them or if I should just try and buy direct stocks of companies I believe in, because they will more than likely inflate at better proportions to their price