With Ultrarunner's post about mergers & takeovers - Always have an alternate plan. I worked for an aerospace company and was accumulating a nice retirement nest egg thru their plan when they were bought out. That money was frozen, could not get it out and it did not gain interest. There were law suits over that! So 20 years later when I retired, the principle became available, but the interest that it should have been accumulating was not. If it weren't for the other accounts I'd set up, I would not have been able to retire when I did.