In December 2025, the Solana network reportedly handled a Distributed Denial-of-Service attack peaking at about 6 terabits per second without downtime or a meaningful rise in fees. Co-founders and infrastructure operators attributed this resilience to upgraded defences, validator clustering, the QUIC protocol, and local fee markets, as the validator set shifts toward larger professional operators.

On 12 December 2025, Tether proposed an all-cash deal to purchase Exor's entire 65.4% shareholding in Juventus Football Club, alongside a pledge to invest up to €1 billion in the club. The offer, which would have led to a subsequent public tender for remaining shares at the same price, has been unanimously rejected by Exor, cancelling the transaction. Tether had framed the move as a strategic expansion beyond stablecoins into elite sport, media and global fan markets.

YouTube has added PayPal's PYUSD as an opt in payout rail for eligible US creators, according to Fortune. The workflow issues earnings, makes them available via PayPal Hyperwallet, and lets creators cash out to PYUSD, with the stablecoin's market cap around $3.91 billion and YouTube's creator payments exceeding $100 billion in four years.

Bitcoin is on track for its first full‑year break from stock market performance in more than a decade, as equities rally while BTC posts a yearly loss. Data show the S&P 500 has gained over 16% this year while Bitcoin has fallen 3%, forcing investors to reassess whether the asset is in a normal correction or facing a deeper structural shift.

Russian cryptocurrency exchange Garantex is reportedly operating again under Western sanctions, with Global Ledger tracing over $34 million in related wallets and at least $25 million already paid out to former users. Investigators describe a structure that routes funds through mixers, cross-chain bridges and aggregation wallets, while Russia's A7A5 rouble-pegged stablecoin has processed more than $87 billion in trade as companies convert roubles into USDT for cross-border payments.

BitMine purchased approximately $200 million worth of Ethereum in two transactions this week, further consolidating its position as the largest institutional holder of the asset. The firm acquired 22,676 ETH for $68.7 million on December 6, following a $130.8 million purchase of 41,946 ETH on December 5. BitMine's total Ethereum holdings now exceed 3.73 million ETH, valued above $11 billion.

SpaceX transferred approximately 2,246 BTC in transactions exceeding $200 million over a 12-hour period and the preceding week, according to Arkham Intelligence. The aerospace company maintains control of more than 5,012 BTC valued at approximately $448 million. Blockchain analysis shows no confirmed connections between destination wallets and known cryptocurrency exchanges.

S&P Global Ratings downgraded USDT's stability score from constrained to weak on Wednesday, citing increased exposure to volatile assets including Bitcoin. The rating agency noted Bitcoin now represents 5.6% of circulating USDT, exceeding Tether's previously stated 3.9% buffer. S&P Global expressed concerns regarding transparency and limited disclosure of underlying reserve assets.

Texas has allocated $10 million toward a state Bitcoin reserve through a dual-phase strategy. The state purchased $5 million of BlackRock's IBIT ETF on November 20, 2025, at approximately $87,000 per Bitcoin, according to Texas Blockchain Council president Lee Bratcher. A second $5 million tranche is designated for direct Bitcoin custody pending completion of regulatory infrastructure under Senate Bill 21.