"Historically, Fed taper has been a headwind for bitcoin," one fund manager said.
The dollar may depreciate after Friday's event, triggering renewed inflows into bitcoin and equities.
Closer to home, Brainard said without a digital dollar the proliferation of stablecoins could fragment the payment system.
The U.S. central bank will continue buying Treasury and mortgage bonds to support the economy.
They will show resilience even if the central bank curtails its monetary stimulus program.
Decentral aims to perform similar monetary functions for cryptocurrencies as the Federal Reserve does for the U.S. economy.
The Boston Federal Reserve is close to launching their own private supervisory node.