The bitcoin price has continued to build on recent gains, adding $15 over the last week. This represents a 6% increase over the opening price on 2nd March, according to the CoinDesk Bitcoin Price Index.

The week's biggest intra-day price swing happened early in the week, when bitcoin hit a high of $286.28, representing a gain of $19.24 from the day's low.

Trading sessions ended in positive territory on four consecutive days, from the end of the previous week and into the first days of the week just passed. Some $50 separated the daily low at the start of the sessions and the high at the end, on 3rd March.

Bitcoin price gains were supported by strong volume growth. Some 3.67 million coins changed hands on the week ended 7th March, which was a 55% increase over the previous seven-day period.

Big volume gains came from Bitfinex and Bitstamp, which saw spikes of 106% and 54% respectively. Chinese exchanges Huobi and OKCoin also recorded significant increases of 95% and 83%.

BTC China

still leads the mainland Chinese exchanges on volume traded, just barely beating OKCoin in last week's trading activity. Bitfinex continues to dominate trading outside the mainland.

Notably, Coinbase's exchange, launched in January, continues to see more coins changing hands than the ex-market leader, Bitstamp.

Newsflow this week was relatively calm. One significant event was the US Marshals Service's third bitcoin auction, which saw more bidders take part than its last sale in December. But the number of bidders – 14 in all – remains significantly lower than the 45 who took part in the inaugural sale in June.

Another news event that could have added to positive bitcoin price sentiment was the US banking regulator's remarks that digital currencies could be "revolutionary" for the global financial system, delivered to an audience of financiers at the Institute of International Bankers.

Market-watchers were still chattering about the Bitcoin Investment Trust's regulatory approval, which was announced last week. Arthur Hayes at derivatives exchange BitMEX teased out the nuances of the BIT offering in his weekly newsletter, calling it an "ETF Halfway House" rather than a true exchange-traded fund offering. The latter, such as the planned Winklevoss ETF, could bring a firehose of liquidity to the bitcoin markets.

When BIT begins trading in the US over-the-counter markets, it will only bring liquidity to existing holders of BIT units. These holders will be able to sell their units on the newly accessible OTC markets.

However, the trust will only directly contribute to increased bitcoin demand and liquidity if the trust creates new units for its members, an act that's hampered by the fact that its members are limited to wealthy, 'accredited' investors.

By contrast, the Winklevoss ETF will link demand for its units directly to demand for actual bitcoins. Each ETF share will be worth 0.2 BTC upon listing, coins which are actually held by the Winklevoss fund. New units can be created daily, an act that will require more coins to be deposited with the trust.

Hayes summed it up:

While the BIT approval is a big step for the bitcoin markets, therefore, the real wave of liquidity required to shore up the price will only come when the Winklevoss fund – or another, more nimble issuer – hits the markets.