Coinbase said users were experiencing log-in issues because of record-high traffic as bitcoin's price surged.
Bitcoin soared above $19,500 a coin on Coinbase's GDAX exchange on Thursday at about 11:30 a.m. ET, three hours after it blew past $16,000.
The massive tear upward seems to have put pressure on Coinbase's infrastructure — the exchange said on Twitter that users were experiencing issues logging into their accounts because of record traffic:
Coinbase, the largest platform for buying and selling cryptocurrencies in the US, has experienced several outages as the price of bitcoin has skyrocketed to new highs.
The exchange was down for about an hour on Friday, two days after a major system outage kept many users from accessing their bitcoin wallets.
The price of bitcoin on Thursday was all over the place, with various exchanges showing significantly different prices — some more than $1,000 apart. The immaturity of the bitcoin markets has often created price discrepancies, which would be unheard of elsewhere on Wall Street.
At 12:48 p.m., for instance, bitcoin was trading at $19,141 a coin on Bithumb, an exchange in South Korea. At the same time, it was trading at $14,573 on Bitfinex, based in Taiwan.
Cryptocurrency exchanges, which don't have the industrial infrastructure of traditional exchanges such as the New York Stock Exchange or the Nasdaq, are under pressure to handle record trading volumes.
Twenty-four-hour trading volumes reached a record high above $28 billion on Thursday, according to CoinMarketCap, a cryptocurrency data site. To put that in context, $50 billion worth of securities trade on the NYSE during an average trading session.