The month of October, celebrated as "Uptober" by long-time crypto investors, has historically churned out some big gains for bitcoin.
In seven of the last 10 years, bitcoin has posted a positive month.
For four of the last six years, ether has ended the October trading month higher, according to Kaiko.
Bitcoin was lower for the month by 0.3% as of Tuesday, while ether was down 1.4%, according to Coin Metrics.
"Crypto market volatility has dipped to multi-year lows over the past month, with bitcoin's 20-day volatility now equal to that of the Nasdaq equity index," Kaiko head of research Clara Medalie told CNBC.