Traders will be keenly watching bitcoin’s UTC close on Friday, as potential failure to rise back above $40,000 may invite more chart-driven selling. “The loss of the $40,000 mark today will likely lead to more bearish sentiment, which in turn could push the price further down – it could even test last July’s low of $30,000,” Robbie Liu, a researcher at crypto financial services provider Babel Finance, said in an email.