Trader Eugene Ng Ah Sio has highlighted altcoins as key indicators of the cryptocurrency market's future direction. In a recent post, Eugene noted that while Bitcoin's price has struggled to break below $84,000, the overall market trading volume has significantly decreased, with sellers appearing exhausted. He suggests that the market could see a surge if a few large buyers enter, given the thin order book. Eugene, who has taken long positions on Bitcoin and small-cap altcoins, believes there is substantial upside potential for long positions below $90,000, with a clear stop-loss level. He anticipates increased market volatility in January, a historically volatile month, as December concludes.