Earlier quoted context omitted.
Because the previous times it wasn't being hyped in mainstream news and culture. The point where the guy on the elevator is taking about [bubble] is the point at which [bubble] is about to burst for real, because you've just about run out of new suckers to fuel it.
Well, the gold bubble has yet to "permanently" pop, and has been through multiple phases of mania - an arbitrary substance worth trillions of dollars which our entire supply of fits in 3 olympic swimming pools. Socially agreed upon value can potentially last for generations without any fundamental sense.
Throughout most of modern history, you could buy things with gold and that's unlikely to change. Barring alchemy or some extreme globalwide natural disasters, there's a value floor on gold that's missing with bitcoin.
There are no current killer applications for bitcoin beyond some semi-legal trade of illicit drugs and ransomware which doesn't even need or cause the currency price to go up since it's usually converted back and forth to fiat. Perhaps this will change if countries currencies go belly up and die (think Venezuela, Argentina and Zimbabwe).