Understand uncertainty, concentration and the possibility of losing capital.
Return is only one side
Price uncertainty, business risk, liquidity, concentration, fees and the possibility of loss are part of market participation.
Ask what could go wrong
A useful journal question is: what information would prove my current interpretation incomplete or wrong? This encourages review rather than certainty.
Personal circumstances differ
An example suitable for a lesson may be unsuitable for a real person. Personal decisions may require an appropriately licensed professional in Singapore.
Journal prompt
Write one fact you observed, one assumption you made and one question that remains unanswered.
Risk reminder
Markets are uncertain and investing can result in loss. Historical information does not guarantee a future outcome.