Bitcoin price (BTC) shed more than 10% on July 11 as markets appeared to react to criticism of Facebook’s Libra from a senior United States lawmaker.

Market visualization courtesy of Coin360

Data from Coin360 sees the majority of cryptocurrencies firmly in the red Thursday, hours after Federal Reserve Chairman Jerome Powell said Facebook’s offering should not continue development.

Libra, which aims to act firstly as a cross-border payment method, allegedly buoyed Bitcoin throughout recent weeks, with commentators arguing its public profile was driving publicity and uptake of Bitcoin itself.

Powell’s demands, which follow similar words from representatives of the Senate House of Financial Services Committee, leant weight to that theory.

“Libra raises serious concerns regarding privacy, money laundering, consumer protection, financial stability,” he said during a speech before a congressional committee. “These are concerns that should be thoroughly and publicly addressed.”

“These are concerns that should be thoroughly and publicly addressed.”

At press time, BTC/USD traded down 10.4% at $11,530, having risen as high as $13,160 in recent days.

Bitcoin 7-day price chart. Source: Coin360

The drop places the pair still within its recent corridor between around $9,700 and $13,800, with volatility still in evidence across crypto markets.

Altcoins, meanwhile, delivered noticeably worse performance as Bitcoin price fell, with several assets in the top twenty by market cap shedding 15% or more.

Ether (ETH), the largest altcoin, lost a similar amount to Bitcoin, hitting $272 and firmly losing support at $300 once again.

Ether 7-day price chart. Source: Coin360

Among the worst performers were Bitcoin SV (BSV), which lost 17.2%, and EOS (EOS), which was down 20.2%.