Geopolitical instability, such as wars or conflicts, can have complex impacts on financial markets, including cryptocurrencies. Here are a few reasons why wars or geopolitical tensions might affect a crypto bull run:

1. Market Uncertainty: Wars and geopolitical tensions create uncertainty in financial markets, leading to increased volatility. Investors may become risk-averse, pulling money out of volatile assets like cryptocurrencies and into safer assets such as gold or government bonds.

2. Regulatory Focus: During times of geopolitical tension, governments might focus more on financial regulations, including those affecting cryptocurrencies, to prevent capital flight or maintain economic stability. This could lead to stricter regulations, which might dampen investor sentiment.

3. Economic Impact: Wars can lead to economic instability, impacting global markets. If major economies are affected, there might be reduced investment in riskier assets, including cryptocurrencies.

4. Shift in Priorities: Investors may prioritize assets that provide immediate liquidity or are considered safe havens, such as fiat currencies or commodities. This shift can reduce demand for cryptocurrencies.

5. Impact on Technology and Infrastructure: Conflicts can disrupt technological infrastructure and supply chains, which might affect the crypto industry's operational capabilities and innovation pace.

6. Market Maturity and Perception: Cryptocurrencies are still considered a relatively young asset class. In times of crisis, traditional investors may be wary of investing in what they perceive as highly speculative or volatile assets.

While wars can dampen investor enthusiasm for cryptocurrencies, it's also important to note that cryptocurrencies have been seen as a hedge against traditional financial system failures, so some investors might increase their holdings in response to geopolitical instability. The net effect on the crypto market depends on the broader economic and political context and how investors perceive the risk-return profile of cryptocurrencies relative to other assets.