According to @rovercrc on X (Sep 12, 2025), altseason is coming now, indicating heightened bullish sentiment toward altcoins (source: @rovercrc on X). For confirmation, traders often watch a decline in Bitcoin dominance (BTC.D) and a rising ETH/BTC pair, which have historically aligned with stronger altcoin performance (sources: Binance Academy; Investopedia). Breakouts in the altcoin market cap index TOTAL2 and expanding spot/derivatives volume can further validate rotation, while the original post included no supporting data and should be cross-checked with market metrics (sources: TradingView; Kaiko; @rovercrc on X).