Bitcoin ended the first quarter of 2019 near $4,100, up 11% from year-end

The quarter-end record

Bitcoin ended March 31, 2019 near $4,100, completing the first quarter above its December 31, 2018 reference price but still within the subdued range that followed the market’s 2018 contraction.

Coin Metrics’ daily Bitcoin archive assigns a PriceUSD value of $4,094.32 to March 31. Its corresponding December 31 value is $3,687.20. Calculated directly from those two observations, the increase was 11.04%. This is a Coinburn calculation, not a return figure supplied by Coin Metrics.

CoinMarketCap’s historical snapshot independently placed bitcoin at $4,105.40 on March 31, with a reported market capitalization of $72.34 billion, circulating supply of 17,620,525 BTC and trailing 24-hour volume of $9.05 billion. Coin Metrics reported a market capitalization of $72.14 billion and supply of approximately 17,620,617 BTC for its March 31 row.

The two price observations differ by approximately 0.27%. That gap is small enough to support the bounded description “near $4,100,” but it is also a reminder that cryptocurrency had no single official quarter-end closing auction.

What the 11% gain does—and does not—show

The quarter-end comparison establishes that Coin Metrics’ bitcoin reference price was higher on March 31 than on December 31. It does not establish that every holder earned 11.04%, because an investor’s result would depend on execution time, venue, fees and custody or financing costs. It also does not identify a cause for the move.

Coin Metrics describes its historical daily price measure as a fixed closing price denominated in U.S. dollars at 00:00 UTC following the measured day. CoinMarketCap’s snapshot is an aggregated market observation rather than an executable quote from one named exchange. Neither figure should be represented as the settlement price of a particular BTC/USD spot instrument.

The market-capitalization values also require care. They are calculated estimates built from an aggregated price and an estimated circulating supply. They are not measurements of cash invested in Bitcoin, nor do they show how much liquidity was available near the displayed price. Reported 24-hour volume was especially sensitive to exchange coverage and data-quality controls in 2019.

The network behind the price

Coin Metrics’ March 31 network row records 380,878 Bitcoin transactions and 623,888 active addresses during the daily window. Those observations show that the blockchain continued processing substantial activity while the market remained far below its late-2017 peak.

Neither metric is a count of people. One user or service can control many addresses, and a single transaction can involve multiple recipients. Exchange batching, wallet practices, internal exchange ledger transfers and change-address behavior can all separate address or transaction counts from underlying economic users. The figures are best treated as network observations, not adoption totals.

Coin Metrics also records approximately 17.62 million BTC in current supply on March 31. Its on-chain supply series rose by about 165,000 BTC from December 31 to March 31, a difference consistent with continued protocol issuance during the quarter. That calculation does not measure liquid supply: lost coins, long-dormant balances and custodied holdings remain included in ledger-derived supply.

Why March 31 mattered

March 31 provided a clean calendar boundary after a difficult 2018. The verified record showed stabilization rather than a return to bitcoin’s former high: the quarter ended modestly above its December endpoint, with two independent datasets clustering around $4,100.

That conclusion should remain narrow. The snapshot documents price, estimated capitalization, supply and network activity for the specified UTC date. It does not prove a new bull market, explain subsequent movements or establish what traders knew would happen after March 31, 2019.