<ul data-eligibleForWebStory="true">Investing educator David Bird, aka ASX Trader, remains optimistic about Bitcoin while expressing doubts about altcoins.Bird believes in Bitcoin's strength as long as its dominance remains high and the price stays above the US$80k range.He mentioned that most altcoins are in a bear market except for Bitcoin.For altcoins to rise, Bitcoin dominance must decrease, which is currently not the case.Bird emphasized that he will only invest in altcoins if they outperform Bitcoin.Geopolitical turmoil doesn't influence Bird's Bitcoin investment decision-making.He stressed remaining bullish on Bitcoin as long as it maintains levels above US$88k-US$89k.Bird discredited the four-year Bitcoin halving cycle and highlighted the US election cycle's impact on market performance.He mentioned that altcoins are still far below their 2021 highs compared to Bitcoin.Bird uses multiple charts to analyze the crypto market rather than relying on a single chart.He pointed out that the Russel 2000 index can indicate future altcoin performance based on risk appetite.The current divergence of the Russel 2000 from the S&P 500 suggests a low-risk appetite, impacting the performance of altcoins.