Bitcoin holds $83,000 as ZEC drops 12% and oil climbs again

"Bitcoin has pulled back to $83K, testing the lower boundary of last week's consolidation range,” Alex Kuptsikevich, chief market analyst at FxPro, said in an email to CoinDesk. “As with the market as a whole, a retest of the $82K region, where peaks were formed in May and early September, is entirely to be expected under current conditions.”

"Looking ahead, a sustained return to prices below $80K would be an important signal that the market is not ready to move higher for some time yet. If, however, this consolidation is soon followed by a new bullish momentum, it could send the leading cryptocurrency well above $90K," he added.

The pressure is coming from bonds and oil.

Treasuries steadied in Asia after tumbling during U.S. trading, with the 10-year yield up one basis point to 5.25% after reaching its highest level since 2007 on Monday. A higher guaranteed return on government debt raises the bar for holding assets that pay no income, bitcoin among them.

Brent rose more than 1% to nearly $107 a barrel, its second straight gain, as hopes for an imminent diplomatic breakthrough with Iran faded.

Pricier oil feeds into inflation, and traders have been adding to bets that the Fed will raise rates again. MSCI's All Country World Index fell to its lowest since Sept. 18, and Nasdaq 100 futures slipped 0.3% after Monday's tech-led selloff on Wall Street.