Where is this indirect endorsement? I see nothing on the linked page that supports this. All it says is that Graham has funded a Bitcoin-related startup, and then declares that this must mean he indirectly endorses it.
I don't see how you make that inference. You can infer that Graham believes that there is money to be made in Bitcoin services, but not that he endorses Bitcoin itself.
I see 'believing that there is money to be made in Bitcoin services' as 'indirectly endorsing Bitcoin'