Nothing has done more to shake my confidence in efficient markets than cryptoassets. An asset class with the highest degree of transparency of any distinct asset class in history. Still there has been more malinvestment in this space than perhaps any industry ever (https://wiki.mises.org/wiki/Malinvestment).
Nothing has done more to bolster my belief in the Pareto Principle (asymmetry of outcome) as a natural law (https://en.wikipedia.org/wiki/Pareto_principle). And the power of a group of dedicated individuals to change the world.
Produce value.