It appears you're referring to a very strong bullish signal for Bitcoin that has recently emerged or is predicted to emerge. Based on the current information (July 30, 2025), here's an overview of the sentiment and factors being discussed:

The Most Bullish Bitcoin Signal in 8 Years! (As of late July 2025)
The overwhelming "most bullish signal" being highlighted for Bitcoin in 2025 revolves around institutional adoption and the sustained impact of Bitcoin ETFs.

Citi analysts are reportedly anticipating Bitcoin's price to nearly double over the next five months, with a base case target of $135,133 and a bull case soaring to $199,340 by year-end 2025.

Here's why this signal is considered so powerful and potentially the most significant in 8 years:

ETF Flows as Primary Driver: Citi's analysis emphasizes that Exchange-Traded Fund (ETF) flows are the dominant force behind Bitcoin's recent price surge. They suggest that 41% of Bitcoin's return variation can be explained by ETF flows alone since their launch. This direct mathematical relationship between institutional demand and price appreciation is unprecedented.

Significant Supply Held in ETFs: Nearly 6.8% of Bitcoin's total supply is now held within ETF structures. This creates sustained buying pressure that traditional retail speculation simply cannot match, fundamentally altering Bitcoin's supply dynamics. Each $1 billion of weekly ETF flows is correlated with a 3.6% return increase for Bitcoin.

Institutional Shift: Recent visits by analysts to the USA confirm a significant swing towards institutional usage of digital assets, first with corporate US BTC treasuries, then with the uptake of ETF activity in both BTC and ETH. This signals a maturation of the market and a new class of sustained buyers.

Technical Bullishness: Beyond the fundamental drivers, technical analysis also shows strong bullish signs:

Bitcoin price approaching $120,000: Analysts indicate that breaking and holding above $120,000 is key to triggering a rally to new all-time highs.

Bullish Pennant and Falling Wedge Breakouts: Technical patterns like bullish pennants and falling wedges, combined with retests of resistance-turned-support, are suggesting continued upward momentum.

Above Key Moving Averages: Bitcoin consistently trading above its 50-day and 100-day moving averages is seen as a highly bullish indicator.

Improving Spot Volume Delta: While spot buying was negative, it has significantly improved, reflecting a reduction in sell-side dominance and growing buy-side interest, indicating renewed accumulation behavior.

In essence, the "most bullish signal" in 8 years stems from the structural shift in demand brought about by institutional adoption through ETFs, creating a sustained and predictable buying pressure that the market hasn't seen before.

Dogecoin (DOGE) and Solana (SOL) Current Market Trends:
While Bitcoin captures headlines, Dogecoin and Solana are also showing interesting trends.

Dogecoin (DOGE):
Current Price (as of late July 2025): Around $0.22 - $0.23.

Bullish Range: Dogecoin is currently trading in a "bullish range," which is seen as positive for the entire meme coin market.

Institutional Accumulation: There are reports of significant institutional accumulation, with over 1.08 billion DOGE (approximately $250 million worth) accumulated in a 48-hour window ending July 21.

Technical Developments: A new technical proposal by DogeOS aims to make Dogecoin capable of verifying zero-knowledge proofs, which could add utility.

Meme Coin Rotation: Analysts suggest that as Bitcoin and Ethereum rally, gains often flow into meme coins like DOGE. ChatGPT's base case predicts DOGE will reach $0.35 by December 2025, with a bull case of $0.50 if there's a major catalyst like an X (formerly Twitter) integration.

Volatility: Dogecoin remains highly volatile and susceptible to social media sentiment (e.g., Elon Musk's tweets).

ETF Proposal: The Cboe BZX Exchange has proposed a Dogecoin (DOGE) ETF to the U.S. SEC, highlighting rising interest in crypto ETFs for meme coins as well.

Solana (SOL):
Current Price (as of late July 2025): Around $181 - $183.

Strong Bullish Structure: Solana is generally showing a bullish structure, trading above key Exponential Moving Averages (EMAs), and its RSI is in a bullish zone.

Firedancer Upgrade: ChatGPT's analysis points to the "Firedancer" upgrade as a critical catalyst for Solana. A successful testnet and mainnet launch could lead to significant institutional demand for SOL, with predictions ranging from $300 (base case) to $450 or even $600 by year-end under perfect conditions (e.g., favorable SEC rulings on spot SOL ETF filings).

Network Scalability: Solana's focus on high transaction throughput (claiming 65,000 transactions per second) and low fees makes it a leading choice for dApps, DeFi, and NFTs, potentially positioning it as an "Ethereum Killer."

Institutional Inflows: Solana has attracted significant inflows ($311 million recently), contributing to the broader altcoin market's momentum.

Technical Resistance: While bullish, Solana is facing key resistance levels around $193-$219 that it needs to break to confirm further significant upward movement. Volume has also been noted as declining, which could suggest caution.

In summary, the cryptocurrency market, led by Bitcoin's institutional-driven momentum, appears to be in a strongly bullish phase. Dogecoin is benefiting from meme coin rotation and potential new utility/ETFs, while Solana is poised for significant growth driven by its technological advancements (Firedancer) and increasing institutional interest.