Bitcoin (BTC-USD) and ethereum (ETH-USD) traded in negative territory in Friday morning trading, while equities pushed higher and on track for a winning week, in an infrequent relationship that has speculators pondering. Some investors have been taking note of bitcoin (BTC-USD) and ether's (ETH-USD) falling volatility in recent weeks, compared with the jumpy stock market, as the price of the two largest cryptocurrencies by market cap continue to trade rangebound after big drops seen at the beginning of the year.Looking at intraday price action, bitcoin (BTC-USD) slipped 1.6% to $19.01K at 10:34 a.m. ET compared with its $68.9K November 2021 peak, and ether (ETH-USD) drifted down 2% to $1.28K versus its $4.64K all-time high in November a year ago. All three major stock indices each rose less than 1%, with Dow Jones (DJI) +0.7%, S&P 500 (SP500) +0.5%, and Nasdaq (COMP.IND) +0.2%. Jim Bianco, the president of Bianco Research, pointed out that the old Wall Street adage, "never short a dell market," now applies to bitcoin (BTC-USD) as the token's 30-day realized volatility (vol for short) fell to its lowest in more than two years, he wrote in a series of Twitter posts. That may be even more of the case for ether (ETH-USD), which has seen its realized vol plunge to its lowest point in over five years. These vol drops could be seen as a negative because it implies that speculative demand is slowing down. However, "this is an unqu...