Two trading apps have risen to the top of Apple's App Store in recent days. Robinhood holds the number one position, with Coinbase in second, at the time of publication on Friday. In third: popular social media platform TikTok. YouTube, Instagram and Snapchat hold the fourth, fifth and sixth positions, respectively.
One possible conclusion is that folks are now more interested in swapping crypto and financial assets than they are in interacting on various social media platforms
https://cointelegraph.com/news/trading-apps-usurp-tiktok-in-popularity
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!
If I am not wrong the number if downloads decides which app is mostly used but the ranking you are talking about may depends on the trending which doesn't mean the these apps surpass the social media apps. Anyway people are more using cryptocurrency market place which is a good sign of development in the adoption rate.