Bitcoin Weekly Update
Weekly Highest Price was 20,089.00 USD on December 17, 2017
Weekly Lowest Price was 11,833.00 USD on December 22, 2017
Steem Weekly Update
Weekly Highest Price was 4.17 USD on December 21, 2017
Weekly Lowest Price was 2.07 USD on December 22, 2017
Source: https://coinmarketcap.com/