Hong Kong: The great cryptocurrency crash of 2018 is heading for its worst week yet. Bitcoin sank toward $4,000 and most of its peers tumbled on Friday, extending the Bloomberg Galaxy Crypto Index’s weekly decline to 25 percent. That’s the worst five-day stretch since crypto-mania peaked in early January.
	 
	After an epic rally last year that exceeded many of history’s most notorious bubbles, cryptocurrencies have become mired in a nearly $700 billion rout that shows few signs of abating. Many of the concerns that sparked the 2018 slump - including increased regulatory scrutiny, community infighting and exchange snafus - have only intensified this week. Even after losses exceeding 70 percent for most virtual currencies, Oanda Corp.’s Stephen Innes has yet to see strong evidence of a capitulation that might signal a market bottom.
	 
	“There’s still a lot of people in this game,” Innes, head of trading for Asia Pacific at Oanda, said by phone from Singapore. If Bitcoin “collapses, if we start to see a run down toward $3,000, this thing is going to be a monster. People will be running for the exits.”