BTC dominance just hit 60%. Here are three on-chain signals smart money is watching right now. Number one: historically, every time BTC dominance cracks 60%, altcoin beta explodes within 30 to 90 days. We saw it in 2019, 2021 — and the cycle is rhyming again. Number two: whale wallets are rotating. Glassnode shows BTC exchange outflows spiking, while ETH and SOL inflows to cold wallets are quietly…