Those four people would be the most daring people in the history of human specie. That is my humble opinion though. I just salute the great risk they are taking. This Mission has no escape route or fire escapes. Space itself is cold and haunting. surviving a long time in a small space overtime and the discipline it takes to overcome the human limitation. The willingness to sacrifice and the will to take a bold step for our specie. All of it is beautiful.
Elon Musk has a few more surprises left i am sure. (:
Tip of the iceberg. Cheers.