SAP ABAP UI5 OR BI/BW/HANA .Help me out? Which one is best in future

Hi guys,

I am ABAP Developer having 4 years of experience.

I want to learn SAP UI5 but bit confused in UI5 and HANA.

Which is best module among them ? and what are the benefits to learn SAP UI5 and what is the scope in future?

Thanks & regards,

Avi