I think that is arguable. While silkroad did boost bitcoin's early economy, I don't think we can say bitcoin would never have existed without it.

We all know monero is a useful tool for private transactions, yes. But Darth's whole point is that Bitcoin is the apex predator of moneys, while monero is a little shrimp that can see 4,000 colors. It's cool, and it's unique, sure. But Bitcoin's use case far outweighs the needs of a small percentage of people wanting to buy darknet drugs anonymously.