Bitcoin extended its slide on Monday, trading near $86,000 as the Coinbase Premium Index moved back below zero. The sub-zero reading points to softer U.S. buying interest amid rising volatility, while failed attempts to reclaim $92,000 and derisking in futures add to caution. A retest of the $82K–$84K area remains a risk if sentiment does not improve.

Bitcoin adviser and author Terence Michael cautioned the community after a client who had saved for years lost 1 BTC to a romance-style pig-butchering scam. In a post on X, he described how social engineering prevailed despite multi-signature safeguards and advisory interventions. The case underscores limits of custody tools when victims authorize transfers.

On Dec. 15, Bitcoin moved between roughly $88,600 and $89,800 while traders watched transfers from wallets tagged to Wintermute, a narrowing CME futures gap, and a test of rising daily chart support near $89,000. BTC traded about 1.68% lower on the BTC USDT pair, and some analysts warned that a breakdown of this trendline could open the way toward the $80,000 region even as resistance remains clustered around $92,000 to $95,000.

Invesco and Galaxy Asset Management launched the Invesco Galaxy Solana ETP (QSOL), a regulated vehicle offering spot exposure and staking within an institutional framework. The grantor trust supports cash and in‑kind creations and trades on Cboe BZX. SOL priced at $126.13, down 3.59% on the day and over 7% weekly, with volume near $4.8 billion.

Shiba Inu's burn rate has sharply rebounded by 1,567% after a prior 62.96% decline, even as SHIB's price remains under pressure. Dogecoin is sliding back toward 2024 price levels and could fall to $0.1 or even $0.062 if selling persists. XRP's on-chain payment volume has dropped to near-zero, reflecting timing and liquidity dynamics rather than a structural network failure.

ArcBlock's ABT token is trading around $0.28, more than 83% lower than a year ago, with price action remaining below the 50-day and 200-day SMAs and RSI near 33. Projections outline defensive consolidation in 2025, a possible move toward $0.45–$0.46 by 2026, and optimistic targets up to $2.49 in 2030 and $10.50 by 2050 if ecosystem adoption, interoperability demand and long-term execution materialize. Near-term support levels at $0.27 and $0.24 and resistance at $0.33 and $0.36 are seen as critical for traders monitoring ABT's path. Overall outcomes remain speculative and hinged on ArcBlock's ability to attract developers and sustain cross-chain infrastructure relevance.

On 15 December 2025, veteran trader Peter Brandt argued that Bitcoin's long-observed parabolic cycle structure may no longer hold as the market matures. He pointed to slower, less sustainable rallies, earlier exhaustion near record highs, and the possibility of a much deeper pullback than many investors expect. In his view, Bitcoin now behaves more like a conventional global asset, with compressed returns and greater uncertainty around halving-driven booms.

SWFTCoin currently trades around $0.0048 after a long decline from its macro peak near $0.047, with a critical support zone identified at $0.0036 and a trigger level at $0.0083. Projections outline ranges for 2025, 2026, 2030 and 2050, with long-term scenarios tied to cross-chain swap demand and the role of SWFT Blockchain as a routing layer. The price framework spans from $0.0048 in conservative cases up to $0.2600 in optimistic 2050 targets, depending on adoption, integrations and broader market conditions.