1. Exactly what asset class are we referring to? It's probably not a credit bubble that had issues back in 2008, probably not housing, maybe commodities, maybe equities... but most likely HN discussions revolve around the eye-popping valuations in Groupon, twitter, facebook, zynga, and so on. So it's probably not the bubble, but a bubble.
2. How can you tell the difference between a moderate capital mis-allocation and a straight up bubble?
3. Have you actually compared what was going on now compared to any other bubbles that popped?
4. How much widespread adoption have we had with respect to capital allocations in these "overvalued" names? They aren't public, and there's not widespread participation by the "unwashed masses" in this asset. Compare that back in 1999 when non-revenue companies went IPO and everyone piled in.
5. Speaking of IPOs, how are they doing? How many names go IPO right now and see their stock triple in 90 days?
6. What's the size of the total bucket of money in this "bubble" relative to the total capital market?
7. What kind of deviation from historical valuations are we seeing in VC-land? Is it a total market deviation or limited to a few outliers that everyone loves to hate on?
8. Are bubbles really this obvious?
9. Even if we are in a bubble, are we early stage or late stage? Are we hearing about the million-dollar florist from twitter in Time magazine yet?