The middle is bad

The concept being discussed here is Antifragility, which is about managing risks and implementing a barbell strategy.

In simpler terms, Antifragility refers to a system or strategy that not only withstands shocks and uncertainties but actually benefits from them. It is the opposite of fragility, where a system becomes weaker and more vulnerable when faced with stressors.

To better understand this concept, VitalikButerin.icon has written about it in his article titled "凸型処分と凹型処分" (Convex and Concave Responses).