"I was skeptical of Amazon early on too. But they had a couple of things going for them that SpaceX doesn't have: one was a huge potential market. People were already buying books, Amazon made it easy to do from your home, with next day delivery. The other was that Amazon had no competition in that space"

I mean these are both valid for SpaceX also, take out the execution and technological difficulty. There is a huge potential market in space, and they're is practically no competition