This is what indigo does, invests on cripple airlines all over the world, and pulls out when the time is right, no news here.
Last year people went nuts when some of out executives sold some several thousand shares, yep the world and spirit still here.
Spirit will survive, all positive thinkers will see this as great thing for the company, all doom and gloomers will see it as the end of the world as we know it.
Don't rubber neck, just keep on keeping on brother...save what you can and don't forget to live life.