Build the euro buffer before you buy a coin
A coin is a terrible invoice. Cash in euros is how you stay invested when life sends one.
Isaak V · 4 June 2026 · 4 min
The least glamorous investing essay is the one that tells you not to invest yet. It is also the one that keeps a portfolio alive. If a broken laptop, a deposit on a new flat, or two quiet freelance months would force you to sell, you do not have a portfolio. You have a float that markets are babysitting.
Crypto makes this worse, not better. Prices gap. Transfers are not instant goodwill. A stablecoin is not a Dutch savings account. The buffer belongs in euros you can send to a landlord.
Size it against rent, not against a slogan
Three to six months of essential spending is the old rule because it matches how long a job search often feels, not because a textbook prefers the number three. If your income is a salary in a scarce profession, the low end can be honest. If you are freelance, on a fixed contract that ends, or supporting other people, the high end is the honest one.
Count essentials only: housing, food, transport, insurance, minimum debt payments, and the boring subscriptions you would still pay while anxious. Do not count restaurants you would cancel. Write the monthly number down. Multiply. That product is the fund. Everything above it is allowed to take risk.
Where the buffer should sit
A boring savings account in your name, in euros, at a bank covered by a deposit guarantee you understand. Instant or next-day access. No lockup that punishes you for using the money for its actual job. A little interest is nice. Access is the feature.
Do not park the emergency fund in Bitcoin, in a single stock, or in a coin because a referral will top it up. A reward does not change the job of the money underneath it. If you want the €50 crypto offer, fund it with money that is already surplus to the buffer.
The quiet ways people raid it
The obvious raid is a market dip that feels like a sale. The quieter raid is lifestyle. The buffer looks “too large” the month a holiday appears, so it becomes the holiday, and then a dental bill arrives in November. Rename the account if your bank allows it. Boredom is a feature. Hide it from the spending app if that helps.
Another raid is the sophisticated one: moving cash into a “safe” crypto product you half understand because the yield looks like a savings rate. Yield is not the same as a deposit guarantee. If you cannot explain who owes you the euro and what happens when they do not, it is not the buffer.
What investing looks like after the buffer exists
Then the sequence is allowed to start. Monthly contributions. A broad fund. A capped crypto sleeve if you still want one once the cash is real. You will feel late. You are not. An investor who can leave a position alone is worth more than an investor who bought the narrative six months earlier and has to sell it to pay a plumber.
If the buffer is half built, you can still learn. Paper the habit. Read about fees and position size. Open nothing with money you might need in ninety days. Learning is cheap. Forced selling is not.