Interesting results... I think that Bitcoin SV is less known by the few masses that gain interest on crypto, it just popped up not so long ago and people don't care that much about "one more bitcoin"...
Concerning Binance coin, I think it is also natural as it has a limited interest for people not using the exchange... for these it becomes only speculation
For now, I am pretty sure that Bitcoin is the top choice for Google searches, while the others are Ethereum and BNB. So far, I think that the growth every year is huge, but bitcoin is still the first search for new people to know crypto.