Bitcoin tumbles after dramatic gains ahead of futures launch

LONDON/NEW YORK (Reuters) - Bitcoin lost almost a fifth of its value in 10 hours on Friday, having surged more than 40 percent in the preceding 48 hours, sparking fears the market may be heading for a price collapse.

from Reuters: Top News http://uk.reuters.com/article/uk-markets-bitcoin/bitcoin-tumbles-after-dramatic-gains-ahead-of-futures-launch-idUKKBN1E11YT?feedType=RSS&feedName=topNews