I think it's a natural (good) road.
Alphabet should be a good opportunity for Google owners to invest in outside business with a lot of potencial, like Space X. When you are "just" Google, it's hard from a business view point to invest in outside business. It's more like acquisitions and fusions. But with a strong group like that, you can make more moves with investors money. And Alphabet have a lot.
If your bets isn't giving you good results, let's start put some coins outside. But it's just a teory (don't have actual facts to support).