Everything is in relation to the need to reach conclusions on some occasions with a sample of 100 cases it is sufficient or it may be 1 million. As I said it depends on the subject being analyzed.
Something I would like to discuss is the possibility of selling this information, which is something that the mobile app are not watching business.
Big data refers to a process that is used when traditional data mining and handling techniques cannot uncover the insights and meaning of the underlying data.
There were differing opinions on whether to focus on managing less data better, or whether the increasingly lower-cost computing resources would enable more efficient analysis of large data pools.
But the fact is that with the advent of IOT and cheap computing resources, its easier to collect and analyze big data.
So yeah, it is the future.