On December 31, 2018, Bitcoin (BTC) had a market capitalization of $65.3B, based on 17.46M coins issued at a price of $3,740.23.

bitcoin marketcap 2018
DATE CLOSE VOLUME BTC MINED MARKET CAP
December 31 2018 $3,740.23 3,360,637,648 17,455,725 $65,288,449,358.31
December 30 2018 $3,875.32 3,878,872,992 17,453,787 $67,639,067,434.34
December 29 2018 $3,859.58 4,016,765,130 17,451,587 $67,355,855,488.86
December 28 2018 $3,930.81 4,653,936,657 17,449,862 $68,592,173,713.57
December 27 2018 $3,661.57 4,135,598,001 17,447,775 $63,886,313,016.65
December 26 2018 $3,860.88 4,378,137,540 17,445,600 $67,355,427,791.95
December 25 2018 $3,821.03 5,021,013,834 17,443,637 $66,652,671,973.35
December 24 2018 $4,082.15 6,070,760,831 17,441,650 $71,199,431,547.50
December 23 2018 $3,998.00 4,915,531,510 17,439,750 $69,724,078,121.41
December 22 2018 $4,012.93 4,373,845,442 17,437,550 $69,975,694,375.33
December 21 2018 $3,898.74 5,808,864,236 17,435,362 $67,975,935,223.61
December 20 2018 $4,130.67 7,461,656,559 17,433,612 $72,012,538,526.02
December 19 2018 $3,741.55 4,580,615,556 17,431,925 $65,222,455,939.43
December 18 2018 $3,699.15 4,929,269,420 17,430,062 $64,476,424,653.94
December 17 2018 $3,539.73 4,539,839,491 17,428,462 $61,692,008,315.52
December 16 2018 $3,247.59 2,951,687,477 17,426,462 $56,594,087,373.60
December 15 2018 $3,237.84 2,902,546,437 17,425,025 $56,419,436,672.99
December 14 2018 $3,239.06 3,484,923,510 17,423,162 $56,434,731,747.65
December 13 2018 $3,308.87 3,620,077,246 17,421,337 $57,644,932,739.08
December 12 2018 $3,476.86 3,547,146,399 17,419,700 $60,565,937,924.23
December 11 2018 $3,414.70 3,957,753,840 17,418,200 $59,477,920,224.36
December 10 2018 $3,495.31 4,029,549,178 17,416,637 $60,876,595,980.72
December 09 2018 $3,608.44 4,084,813,273 17,415,087 $62,841,237,845.44
December 08 2018 $3,478.08 4,521,971,983 17,413,487 $60,565,460,813.94
December 07 2018 $3,413.80 6,027,778,645 17,411,900 $59,440,739,867.03
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