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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.
Its clearly stated that this do only talks about recent days numbers which means this doesnt count as a whole but its still a good thing that recognition does really show via those numbers.
Neither those people who had made out those downloads are actually interested on making out some trading or some investing then that what matter most.
Its just a matter of time on where full adoption would take place.It might took for more years to come but at least we do know that chances and progress is there.