** Shares of currency miner Marathon Patent MARA.O and
blockchain co Riot RIOT.O rise 21.9% and 12.8%, respectively,
in premarket trade
** Shares of Xunlei XNET.O gain 3.1%
** Shares of cryptocurrency and blockchain-related stocks
jump after bitcoin BTC=BTSP climbs 4.4% against the dollar to
hit a more than 3-month high of $10,120.50 urn:newsml:reuters.com:*:nL8N2DF1J1
** The cryptocurrency has surged about 162% since hitting a
1-year low on March 13
** Bitcoin went through a technical adjustment called
"halving" last month; the previous two halvings in 2012 and 2016
have signaled the start of bitcoin's most dramatic bull runs
over a period of several years urn:newsml:reuters.com:*:nL1N2CT1UP
** Ethereum's ether ETH=BTSP rose 4.5% at $251.70
** YTD, bitcoin rose 41.04% this year
(Reporting by Ashwini Raj in Bengaluru)
((Ashwini.Raj@thomsonreuters.com; within U.S. +1 646 223 8780,
outside U.S. +91 80 6749 2756;))