By Rob Lenihan If you think it’s time to buy crypto, analysts advise to remain calm, do your research, and work with a reputable exchange. It’s looking a little dark out there. Bitcoin, ether and the broader crypto market faced anotherwave of selling Monday, with the world’s most-traded digital currency down another 8% in a selloff that has seen the digital token shed about a quarter of its value in January alone. ‘A Window of Opportunity’Invariably, investors are hearing calls of “buy the dip” but often not much beyond that. Analysts advise investors to remain calm, do their research, and wor…