Bitcoin rose sharply Monday after a credit scare on a major cryptocurrency exchange created a rush for the No. 1 digital currency.

After beginning the day around $6,200, bitcoin BTCUSD, +0.21% traded to an intraday high of $6,960.68 on the Kraken exchange. However, on the Bitfinex exchange, the third largest cryptocurrency exchange by volume, according to CoinMarketCap data, the price of bitcoin traded to an intraday high of $7,788, creating a premium of more than 10%.

The move higher in bitcoin came at the expense of Tether (USDT), the stablecoin on the Bitfinex exchange, which traded to 88 cents. A stablecoin traditionally trades at or very close to $1 as it is a U.S. dollar backed coin that investors use to trade between different cryptocurrencies as opposed to going in and out of fiat.

“People were willing to pay more to get hold of bitcoin and get off USDT as worries circulated about credit risk,” said Charles Hayter, co-founder of CryptoCompare.

Tether has been closely scrutinized in the past whether it actually holds enough U.S. dollars in reserve to back its stablecoin.

In Monday trading, a single bitcoin was changing hands at $6,527.24, up 4.4% since Sunday at 5 p.m. Eastern Time on the Kraken exchange. While on Bitfinex, bitcoin was still trading at a premium at $6,908.

Read:How Bitfinex, Tether are raising eyebrows in the cryptocurrency market

The jump in bitcoin dragged smaller coins, known as altcoins, higher. Ether ETHUSD, -1.05% was up 3.1% at $201.05, Bitcoin Cash BCHUSD, -1.24% was up 1% to $442.60, Litecoin LTCUSD, -1.33% was up 2.2% at $53.07 and XRP XRPUSD, +0.04% is trading at 44 cents, up 6.4%.

In bitcoin futures, the Cboe Global Markets October contract US:XBTV8 rose 0.5% to $6,390, while the CME Group October contract US:BTCV8 was off 0.1% to $6,385.

Fidelity to offer crypto services

Fidelity Investments said Monday it had launched a new company that will offer crypto trading and security offerings to clients.

The company, Fidelity Digital Asset Services LLC, will offer services to hedge funds, family offices and other market participants, according to a press release.

“Our goal is to make digitally-native assets, such as bitcoin, more accessible to investors,” said Abigail P. Johnson, chairman and CEO of Fidelity Investments in a statement.

Further reading:Fidelity launches cryptocurrency trading platform