hindsight is 20/20

this expression is real.

the first-word hindsight

 

20/20 means perfect vision.

the number they give you is 20/20

 

my vision is really bad.

understanding how you made a decision after the event is always easy.

 

지나고 나니까 보인다

 

she knew too much information about car

those are guy things

hindsight was 2020

 

I should have 

right now the price of bitcoin is over 6000 dollars.

The price is gone up.

 

 

after the decision have been made, and we see the result,

it is always easy what decision and what have been better.