Mistake three
Treating being young as an investment strategy
Two opposite versions of this show up constantly, and they are the same mistake wearing different clothes.
In the first, being young is treated as permission. There is time to recover, so speculation, tips, concentrated positions and whatever is performing this quarter all seem reasonable. Losses are treated as tuition. The problem is that an early bad experience frequently ends the investing altogether — the investor withdraws from market-linked investing entirely, at precisely the age when a long horizon was their biggest advantage.
In the second, being young is treated as a reason for caution. The money goes only into whatever feels safest and is left there for a decade, without anyone asking whether that choice is capable of meeting a requirement twenty years away.
Both are taking risk — or refusing it — because of age, rather than because of what the money is for.
The strategy should follow the requirement: what the money must achieve, when it is needed, what the household can sustain, and whether you will realistically be able to stay invested through a bad year. Age is one input into that, not a substitute for it.