Many would have ethical objections, but I think a lot of sane people would volunteer to be the first person on Mars even if it was understood to be a one-way mission.
It's a claim that has the safety of there not actually being any plan or need for me to prove my claim. But for what it's worth, I've also taken the same attitude towards startups I'm impressed by. It's not really about me and what I want, so much as there's this big thing that I want to happen and if I can shovel some dirt and bring us a step closer, I'm in.
You don't need many, you just need enough.