The 5% Fun-Money Rule
Keep speculative bets like crypto to 1-5% of a well-diversified portfolio
- Difficulty
- Easy
- Time to result
- ~ongoing to results
- Steps
- 3
- Confidence
- 89%
Sethi's risk-management rule for speculative assets: if you have a genuinely well-diversified portfolio and want a little fun, put 1-5% into anything speculative — crypto, an individual stock, a friend's bar in Brooklyn. The danger isn't the asset; it's people going all-in, expecting 4,000% returns and treating diversification as boring 'for old people'. This game is a marathon meant to be lived for 60-70 years, not a blow-out for a 10,000% return.
Origin
Sethi describes crypto enthusiasts who put everything in, and contrasts them with his own Ethereum holding kept under 5% of his portfolio for decades.
Core principles
- 01Speculation belongs in a small slice (1-5%) of a diversified portfolio.
- 02Expecting 4,000% when stocks return ~7% over a century is a red flag.
- 03Risk-seekers wrongly see diversification and risk management as boring.
- 04We loudly share wins and hide losses, distorting everyone's sense of normal.
How to run it
- 1
Build the diversified core first
Establish a well-diversified low-cost portfolio before any speculation.
- 2
Cap the fun money at 1-5%
Allocate no more than 1-5% to speculative bets you can afford to lose.
Pro tip Sethi holds Ethereum long-term but keeps it under 5% and never trades it.
Watch out Going all-in on a speculative asset is how people go bankrupt.
- 3
Adopt a decades-long horizon
Treat the speculative slice with the same patient, no-checking discipline as the core.
In the wild
Sethi asked on Twitter where the 2020 crypto bros went and offered to anonymously share loss stories; he got fewer than three replies.
→ We broadcast successes and hide losses, so the 'everyone's getting rich' picture is an illusion.
Common mistakes
Going all-in on speculation
Putting your whole portfolio in crypto or a single bet chases outsized returns and often ends in a total blow-out.
Is it for you?
Best for
Investors tempted by speculative assets who want to participate without ruinous risk.
Not ideal for
Anyone without a diversified core portfolio yet — build that first.
From the transcript
“if you have a well-diversified portfolio and you want to have a little bit of fun with one, two, even 5% of your portfolio, go…”
From the episode
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