That raises doubts about the future of bitcoin.
But even at the apogee of the American century there were doubts about the future.
With doubts about the future of the race in Hockenheim, there were hopes that the Nürburgring could replace it.
"I have grave doubts about the future of public good research in CSIRO in the current funding arrangements," Church said.
He also concedes that although he wants to resume a normal life, he has doubts about the future.
Prospects look even worse after Nick Boles, the skills minister, this week raised doubts about the future of FE colleges.
But T-Mobile USA's share of the mobile market is slipping further, partly because of doubts about the future of the business.
But away from the euphoric crowds, there were many in Tripoli filled with fear for the coming days and doubts about the future of Libya.
In the last half of 2011, when doubts about the future of the euro escalated, Italian banks only bought 12.4 billion euros of government bonds.
According to new research, doubts about the future, some of them self-inflicted, are a likely cause.Common sense suggests that doubt might dull investment.
He denied that the club's money worries had got to the players, who were all paid this week, but said that there were real doubts about the future.
