Creditors who owned more than 70% of the bitcoins lost by Mt. Gox have agreed to support efforts by a group of U.S. investors to acquire and revive the collapsed bitcoin exchange, rather than have it liquidated by a Japanese court, according to John Betts, one of those investors.

Mr. Betts is with Sunlot Holdings, an investor group that had been trying to buy Mt. Gox since January 2013. It is now offering a token payment of one bitcoin, worth about $500, to buy the exchange, according to people with knowledge of the matter.

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