DCG has significant developer resources and expertise within its portfolio companies. I think Silbert realizes that the Bitcoin blockchain will be difficult to scale. A lot of DCG's portfolio companies' business models are built around the idea of the public Bitcoin blockchain. If Bitcoin can't scale, those companies will need a new public blockchain for their businesses. Given that Silbert has a significant position in ETC, it's likely that he will direct his companies to work with the Ethereum Classic blockchain.
Aside from that, ETH isn't the true Ethereum chain, Code is Law.
Do you think Coinbase will eventually allow its users to buy and sell ETC?
RE: Why Ethereum Classic Will Moon