I came across an impressive theory about investing.

Historically, the more people who can beat the market in a short period, the more there are.
But over a span of 20 years or more, it's extremely rare.
Because even the most talented traders find it difficult to avoid making big mistakes over 20 years.
A person's **perseverance** is limited.
Even the most talented individuals find it hard to stick to their principles for a lifetime.
Once **perseverance** runs out, mistakes are inevitable.
And for leveraged traders, one big mistake might just wipe out all previous gains!