New onchain metrics show that newly formed Bitcoin whale addresses have grown to control nearly 50% of BTC’s realized capitalization, suggesting a major reset in the network’s cost basis. Short-term holder supply has expanded by about 100,000 BTC over 30 days to a record level, while whale wallets have been net buyers as smaller traders reduced risk.

Metaplanet, a Tokyo-listed Bitcoin treasury firm, launched a Sponsored Level I ADR under the ticker $MPJPY, allowing U.S. investors to trade its equity in dollars. Trading on the U.S. OTC market begins December 19, 2025, with each ADR representing one ordinary share and no new shares issued. Deutsche Bank is depositary and MUFG Bank the custodian.

U.S. spot Bitcoin ETFs logged $457 million in net inflows in one day, with Fidelity and BlackRock products driving most of the demand as total ETF assets climbed above $112 billion. At the same time, options data shows implied volatility around 44% and persistent put skew ahead of Bitcoin's largest-ever options expiry, signaling traders are hedging for downside and more contained near-term price swings.

Hyundai Group's headquarters in Seoul received an email demanding 13 Bitcoins and threatening detonations at 11:30 AM if unpaid, according to South Korea's police. The message cited sites in Jongno-gu and Seocho-gu; 13 BTC is worth $1.1 million (KRW 16.4 billion) at current prices. Police searched facilities and said no explosive devices were found.

On December 19, Bitcoin rose 0.11% over the last day and was quoted at $88,260. A brief push above $88,500 on the hourly chart reversed, implying risk of a move toward $86,000 and reinforcing a likely $87,000-$90,000 consolidation. The broader crypto market was described as neutral at the end of the week, according to CoinStats.

In the past week, Aptos proposed opt-in post-quantum signatures and Solana ran a quantum-resistant testnet, while parts of the Bitcoin community urged faster work on quantum safety. Several major networks treat quantum risk as a long-term engineering challenge, even as Bitcoin debates how prominently and urgently to address it.

On December 19, 2025, mixed market signals suggested Bitcoin may be nearing a late‑cycle transition after slipping below $85,000 earlier in the week. According to Fidelity's Jurrien Timmer, the October move above $125,000 could have marked the cycle's peak, with potential downside toward $65,000–$75,000. Miner stress and defensive positioning reinforce cautious sentiment.

On December 19, 2025, CryptoQuant's sentiment analysis indicated Bitcoin's demand has cooled since early October, with U.S. spot ETFs turning net sellers in Q4 2025 and offloading about 24,000 BTC. Derivatives data show reduced risk appetite, while short-term holders face average losses of -14.9% with BTC near $86,700 and a cost basis around $101,800.