Bitcoin goldrush sparks fears of speculative bubble

As Bitcoin continues to scale to record highs, those betting on it are beginning to worry when the bubble will burst. — REUTERS

Bitcoin has enjoyed a record-breaking week after electric carmaker Tesla and Wall Street finance giants sparked a goldrush for the world's most popular virtual currency, but bubble fears persist.

Investors and mega-corporations alike have been wooed by dizzying growth and the opportunity for profit and asset diversification.