LONDON, Jan 4 (Reuters) - Bitcoin BTC=BTSP slumped 14% to$27,805 on Monday, losing ground after making dramatic gainsover the new year break.

The world's most popular cryptocurrency surged over $30,000for the first time on Saturday, touched a record high of $34,800a day later, as investors continued to bet the digital currencywas on its way to becoming a mainstream asset.

(Reporting by Thyagaraju Adinarayan, editing by Tom Wilson) ((thyagaraju.adinarayan@tr.com; +44 20 7542 7015; ReutersMessaging: thyagaraju.adinarayan.thomsonreuters.com@reuters.net;Twitter @thyagu))