Millennials are feeling insecure about their jobs, and they're piling on alternatives to traditional careers to build their own safety nets.

They're the largest generation in the workforce and are taking on multiple income streams, skills training, and other jobs outside their primary work to feel more secure — what Glassdoor terms "stability stacking." This comes as multiple job-holders are increasingly well-educated, middle-class earners, indicating that labor market instability is plaguing the generation that should be in their prime working years. READ MORE