Fed study: seeing the gain makes you buy

Bitcoin closed Sunday at €66,512. Six days earlier, on 17 August, it stood at €55,662 — a 19.5% rise in under a week. In that same week the Federal Reserve Bank of Cleveland published a working paper on what a week like that does to people.

The finding is uncomfortable, which is exactly why it is worth reading.

What the researchers did

They showed some participants bitcoin's return over the previous twelve months. The others were not shown it. Nothing else differed. Participants were then asked how much of their wealth they would want to hold in crypto, and later it was measured what they had actually bought.

That extra allocation came mostly not out of other investments, but out of savings and cash.

Where it gets uncomfortable

Two things stand out.

First: the effect was strongest among the people who knew least about crypto. Those who know the market well were less swayed by a single return figure.

Second: participants did not expect a pullback after a rise. They extrapolated. Crypto owners expected an average 22% return per year, non-owners 7%. The researchers summed up the mechanism drily: positive returns attract new participants, and those participants push the price higher still.

That is not a description of a market processing information. It is a description of how a bubble gets going.

What this means for you

This article does not tell you whether to buy. We do not know that, and neither does anyone else.

What it does say: if you are considering stepping in this week because the price has gone up, you are precisely the participant in this study. That is not a reproach — it is a good moment to do one sober thing, namely work out what the purchase will cost you in fees.

That difference is bigger than people think. On a €5,000 purchase, a 0.15% rate costs you seven euros fifty; 1% costs you fifty euros. Same bitcoin, same day, more than six times the cost. We checked every partner's rates against the European source; the comparison is below.

And the mirror image belongs here too: on 22 August bitcoin traded between €60,100 and €67,406 within a single day. That is more than €7,300 of range in twenty-four hours. Whoever buys at the wrong moment loses more to timing than they could ever save on fees.

Sources: Federal Reserve Bank of Cleveland, working paper Do You Even Crypto, Bro? Cryptocurrencies in Household Finance (Weber, Candia, Coibion and Gorodnichenko), as reported by CoinDesk and Cointelegraph. Prices: daily BTC/EUR series from Alpha Vantage, closing prices for 17 and 23 August 2026 and the high and low of 22 August. Last checked: 24 August 2026.

This is not investment advice. Crypto is risky and you can lose what you put in.