Auction houses have increasingly adopted cryptocurrencies as modes of payment.

Signs are growing that a global supply chain crisis which has confounded central bank inflation forecasts, stunted economic recoveries and compressed corporate margins could finally start to unwind towards the end of this year.

"There is definitely a feeling of urgency at least for some (Fed) members," said Commonwealth Bank of Australia strategist Kim Mundy.

U.S. Treasury yields have shot higher this year, rising faster than many forecast. Investors are now assessing if anticipation of a more hawkish Fed will continue to push levels up, with the potential to upset riskier assets.