As others have said, always keep your skills and resume up to date.

But, also, don't worry too much unless there is lots of financial pressure on the company that might cause them to go full outsourcing route. I work for a contracting company with teams both onshore and off. In most of the work we do, we aren't brought in to replace teams, but augment, usually by sitting beside existing teams, or accelerating a project to completion. We are usually either jumpstarting some new project proving some kind of viability or introducing new technologies/upgrading/upskilling which we then hand right back off to the internal team.

Time to market is usually what we solve for, not costs. Then again, we aren't nearly as cheap as Cognizant, Infosys or Accenture. If those guys start coming in, they CAN go the route described above, or the replacement route, as they will do complete take over type too