That would be irrational. It’s a Prisoner’s Dilemma and no matter what any individual would prefer to do the only rational move is to assume others will betray you. I don’t think it’s fair to ask SV to behave irrationally.
First, it's not a Prisoner's Dilemma if the parties can communicate with each other:
https://en.wikipedia.org/wiki/Prisoner%27s_dilemma
> Two members of a criminal gang, A and B, are arrested and imprisoned. Each prisoner is in solitary confinement with no means of communication with their partner.
Second, the traditional framing of the Prisoner's Dilemma disregards the aftermath, and the lasting reputational and trust consequences of betrayal, which would be substantial for any VC that failed to cooperate, or outright backstabbed the others.
https://www.microsoft.com/en-us/research/publication/byzanti...