I think I am smarter than everyone around me, why? Am I smart or am I an idiot? Is it because I underestimate people?

Oh, welcome to the club!

I don’t know who you are but given the details added to the question, I would recommend you to check this quick Wikipedia entry:

Dunning–Kruger effect – Wikipedia

In short:

“The Dunning–Kruger effectis a cognitive bias in which low-ability individuals suffer from illusory superiority, mistakenly assessing their ability as much higher than it really is. Dunning and Kruger attributed this bias to a metacognitive incapacity, on the part of those with low ability, to recognize their ineptitude and evaluate their competence accurately. Their research also suggests corollaries: high-ability individuals may underestimate their relative competence and may erroneously assume that tasks which are easy for them are also easy for others.”

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What is the single best financial move you have ever made in your life?

My single best financial move was when in 2008 (just before the Financial Crisis) I decided to invest every month a certain amount of my salary in a moderately risky ETF like Vanguard’s VOO or VIG: I did this no matter what and never touched this investment for a decade.

I also increased the monthly investment as soon as my career progressed so not to fall into the increased lifestyle trap like I observed my peers were doing.

This is admittedly a “boring” strategy than anybody can follow and does not require you to learn exotic options or get any insider information.

After I started a decade ago, also my mum, my little sister, my girlfriend, my old uncle and a few of my friends (all of them completely alien to any financial knowledge or investment experience) also took this (long-term) approach with excellent returns.

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