Keep pumping this bubble up. Who says your market cap should have anything to do with your current profits, or any reasonable (or even unreasonable) expectations for future growth?
Everyone saying you're taking shelter in index funds, beware that a lot of index funds are also hugely contributing to this bubble. Many invest in companies proportional to their market cap, so many index funds aren't as diversified as you like to believe. The Apple bubble concerns me enough that I'm in the process of moving my money out of several index funds which do include Apple and into index funds which exclude Apple, or at least have a smaller portion in Apple.
A year ago Apple was undervalued at $140. I'll give you that. That's why I bought then. They were overvalued when I sold at $190. They're even more insanely overvalued at $207. I'm waiting for the bubble to pop and them to drop to at least $160 before I think about moving back in.