Depending on someone not doing something that they very easily could is not very good protection.
I'm not depending on them not doing it. Did you know someone can sneak up behind you at just about any point in the day and slice your throat with a kitchen knife? You're not depending on other people to not do that, you know it has an inconsequential chance of happening.
Bill Gates could easily invest to cause Bitcoin to fail for no reason other than he doesn't like it (as an example).
If Bill Gates invested it would:
1. Be on the news.
2. Bitcoin would skyrocket.
So yes please, 1 ticket for Bill Gates investment.