A negative expected value bet also does not mean that it is gambling. For example, buying homeowner's or life insurance. This entire article seems to be quite o

A negative expected value bet also does not mean that it is gambling. For example, buying homeowner's or life insurance. This entire article seems to be quite obvious and should be easy intuition even for a beginner, and doesn't even try to explain how one might be able to tell whether their trading profits are due to luck or skill.