How do you know if this isn't March 2000 all over again. A tech bubble would look different than in 2000 because companies didn't go public the same numbers as

How do you know if this isn't March 2000 all over again. A tech bubble would look different than in 2000 because companies didn't go public the same numbers as last time. That blunts the impact a bit. But it also hides the impact. If VCs go into panic mode you won't know about it until start ups start failing in high numbers from running out of runway.