According to @CryptoMichNL, the widely watched 4-year cycle no longer applies, and 2025 has already disproved it for Bitcoin (BTC) and altcoins (source: @CryptoMichNL on X, Dec 12, 2025). For traders, this signals reduced reliability of halving-timed strategies and a shift toward real-time trend and momentum over calendar-based models when positioning in BTC and altcoins in 2025 (source: inference from @CryptoMichNL’s statement on X, Dec 12, 2025).