October is usually a time for Bitcoin to mount big gains, so much so that traders have named the month ‘Uptober.’ This year, though, the world’s largest cryptocurrency struggled. Bitcoin is down 4% over the past 30 days to nearly $110,000 on Halloween, according to data from Binance . The decline was even steeper for Ethereum , the second largest cryptocurrency by market capitalization, which fell about 10% to now about $3,900.

“October was a bit of a letdown for Bitcoin compared to its strong historical trend, but it’s important to keep perspective—prices have held up well overall, especially after a September that actually bucked the usual weakness,” Joel Kruger, a market strategist at LMAX Group, told Fortune .

The most recent October is the fourth worst for Bitcoin since 2013 a

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