Murphy's law, which stated: "If something can go wrong, it will go wrong," fits perfectly into the world of cryptocurrencies. Here it manifests itself in unexpected drops in exchange rates, loss of access to wallets or failures of exchanges at the most critical moment. For example, the market may collapse immediately after a major investment, or key network updates lead to vulnerabilities. Many traders also face the fact that they sell assets right before growth. Murphy's law in cryptocurrencies reminds us of the importance of caution, asset diversification and emotional stability.