Pulled 54 days of BTC/ETH/SOL data. If you hold all three "to diversify", you're basically holding one coin.

Grabbed 54 days of daily OHLCV off CoinGecko (May 9 → July 1) for BTC, ETH and SOL and ran the boring stats nobody bothers posting because they don't fit a moon narrative. A couple of things jumped out at me.

First the correlations, because they pretty much torch the "diversified crypto portfolio" thing people keep repeating. Pearson on daily returns over the window: BTC/ETH 0.87, BTC/SOL 0.84, ETH/SOL 0.87. That's high. Holding all three is holding one asset with extra clicks. The day BTC drops, the other two drop with it, every time. So if your whole plan is "I'm spread across the majors", that's not a plan, that's one position in a trench coat.

Second, Solana moves 1.6x more than Bitcoin, day in day out. Average absolute daily move close to close: BTC 1.51%, ETH 1.94%, SOL 2.42%. Not exactly breaking news, but here's the part people skip: at the same position size your SOL bag carries 1.6x the risk of your BTC bag. Almost nobody sizes down for it.

Then there's the day-of-week thing, which honestly surprised me more than it should have. Average intraday range across all three (UTC): Thursday 5.00%, Friday 4.83%, Monday 4.76%... and Sunday 2.53%. Crypto "trades 24/7" but the liquidity clearly keeps office hours. Those weekend breakouts on a thin book are the exact ones that fake you out.

Last one, and it's the one that actually bugs me. It was a bear stretch and the daily numbers barely showed it. BTC did −27% over the window and its worst single day was only −6.6%. No crash to point at, just \~36% of days closing green and slow bleed the rest. That's how accounts die, not one big candle, just drift.

Method if you want to redo it: daily returns close-to-close, intraday range = (high−low)/low, Pearson on daily returns, weekday stats in UTC, source is CoinGecko daily OHLCV.

Full table updates on its own every day if anyone wants the live numbers: [https://investisseur2-0.com/en/resources/crypto-market-observatory.html](https://investisseur2-0.com/en/resources/crypto-market-observatory.html)