Clearly crypto is off with a flying start, and topping the charts will prompt others to check what these apps are all about, meaning sooner or later more people will be jumping on this boat!
I have no doubt that crypto is basically the most popular topic on the planet and also the most popular topic being discussed on social media as well. But I do not think that crypto is more popular than social media since the number of social media users surpasses that of crypto by a huge margin. A possible explanation for why both Robinhood and Coinbase trading apps are topping the charts is because more and more people are constantly searching for both apps on the Apple app store more than they are searching for other apps. Crypto is big but it still not quite there yet.