Bitcoin's volatile week rattles faith in crypto resurgence Olivia Raimonde, Bloomberg News VIDEO SIGN OUT The sharp selloff in Bitcoin this week is stoking fresh questions about the sustainability of the cryptocurrency boom. Prices for the digital asset have tumbled about 12 per cent this week, marking the steepest decline since September. Bitcoin was higher on Friday, pushed back above US$32,000 after a series of wild swings the past two days. Commentators have cautioned that a sustained drop below US$30,000 could presage further losses. âBeing Bitcoin, a 10 per cent range intra...