Bitcoin achieved a historic milestone on May 22, 2025, surging to a new all-time high above previous records despite macroeconomic uncertainties and low trading volumes. According to analysis by Gregory Mall of Lionsoul Global, this rally occurred amid three primary catalysts: central bank monetary easing with seven consecutive ECB rate cuts, sustained institutional inflows into spot Bitcoin ETFs exceeding $16 billion year-to-date including record May inflows, and diminished geopolitical trade tensions. However, the advance unfolded on thin participation volumes, creating what market observers term a 'most hated rally'. Crucially, a significant divergence emerged with altcoins severely lagging - Ethereum remained 20% below its November 2021 peak and Solana traded over 30% beneath historic highs as of early June. Bitcoin dominance subsequently climbed to 54% of total crypto market capitalization, up dramatically from 38% in late 2022, reflecting capital concentration in the flagship asset. This dominance pattern mirrors previous cycles where altcoin rallies historically commenced 2-6 months after Bitcoin peaks according to TradingView chart analysis, suggesting potential rotation opportunities may be developing.\n\nCurrent market dynamics reveal early signs of capital rotation from Bitcoin into altcoins. Ethereum has surged 81% from its April 2025 lows, while real-time trading data shows altcoins significantly outperforming Bitcoin over the past 24 hours: Ethereum gained 7.65% against USDT versus Bitcoin's 4.17% rise, Solana jumped 8.23%, and Cardano advanced 6.34%. The ETH/BTC pair climbed 3.145% to 0.02296, while SOL/BTC gained 3.9% to 0.0013689 - critical technical indicators signaling strengthening altcoin momentum. Institutional behavior appears to be broadening beyond Bitcoin, with Canadian Schedule 1 banks holding $137 million in Bitcoin ETFs and Trans-Canada Capital allocating $55 million to spot Bitcoin ETFs for Air Canada's pension fund. Kevin Tam's analysis highlights an extreme supply-demand imbalance: last year's ETF purchases of 500,000 Bitcoin dwarfed the network's 164,250 new coin issuance, compounded by corporate treasury acquisitions of 250,000 BTC. The UK's Financial Conduct Authority reversal on crypto ETNs further accelerates institutional adoption pathways. These conditions historically precede altseason periods where capital rotates toward Layer-1 protocols and DeFi ecosystems.\n\nTechnical indicators and volume patterns confirm emerging altcoin strength. Total Value Locked in DeFi protocols surged 31% since April to $117 billion according to DeFiLlama, reflecting renewed on-chain activity. Trading volumes show robust altcoin participation: Cardano recorded 432,124 ADA traded against USDT in 24 hours with 6.34% price appreciation, while Solana saw 4,629 SOL volume accompanying its 8.23% surge. Avalanche notably gained 6.73% against Bitcoin, reaching 0.00022670 on strong volume. The ETH/BTC breakout above 0.02296 with 3.145% daily gain establishes critical support for broader altcoin momentum. However, the OECD's warning about fragile global economic conditions and tightening credit markets presents material risks. Trading strategies should monitor Bitcoin dominance thresholds - sustained closes below 52% would confirm altseason onset. Portfolio allocations to equal-weight baskets of Layer-1 tokens like Solana, Avalanche, and Near Protocol offer diversified exposure to this rotation, while DeFi tokens provide leveraged beta to increasing on-chain activity. Strict risk management remains essential given crypto's persistent correlation with risk assets and potential macroeconomic shocks.