The Straits Times' News In A Minute: Dec 22, 2017

Today's top news headlines: Cryptocurrency cafe opens in Singapore, first in-depth archaeological survey in Pulau Ubin, and five injured in chain collision on PIE.

In The Straits Times' News In A Minute today, we look at:

* Singapore's first cryptocurrency cafe opened its doors in Robinson Road.

* An in-depth archaeological survey will be done in Pulau Ubin to shed light on Singapore's trade, economic and military history.

* At least seven cars were involved in a chain collision on the Pan-Island Expressway, causing traffic congestion till Lornie Road.