Bitcoin's slide at the start of the week sparked fears of an outflow of money from US exchange traded funds, but buyers of bargains have piled into cash, in part a pattern that suggests it will be less volatile over the long term. In the four days to Thursday, 11 spot bitcoin ETFs in the U.S. had net inflows of $737.50 million, keeping the price steady at around $58,000. The price of bitcoin fell to $53,602 on July 5 due to a sell-off of seized tokens and concerns about the disposal of tokens by creditors of the bankrupt Mt. Gox exchange. Market participants believe that the ETFs of giants such as BlackRock and Fidelity Investments provide the basic demand that can moderate price volatility. These six-month-old portfolios have amassed about $51 billion in assets, more than 4 percent of bitcoin's supply, with hedge funds and wealth advisors as major holders. These professional institutions stand in stark contrast to individual investors who were attracted to cryptocurrencies as get-rich-quick trades in earlier years.