Is it good to change .net domain to BizTalk Server?

Question

Hi I am having over all 4 years of exp on .net.I want to decided to change .net domain to biztalk server for my career growth.If I change how was the career growth in biztal server.

Is it good decision for change or not?Please sufggest frnds !.. 

Which one is good in market AZURE or BIzTalk Server?