Many senior leaders across financial services firms have asked what would happen if a tech giant like Amazon were to enter their industry tomorrow. Yet there is a place where this has already happened that may shed some light.

Here, the leading E-commerce company is more dominant than Amazon is in the US, and the equivalent of Facebook has three apps with over half a billion users.

Here, every tech giant is carving out its slice of the financial services cake, already having had a disruptive impact on multiple segments of the market...