Which trading is halal?

Could you please elaborate on the concept of "halal trading" in the context of cryptocurrency and finance? I'm curious to understand what criteria determine whether a trading practice is considered halal or not. Could you provide examples of trading activities that are generally deemed acceptable according to halal standards? Additionally, are there any specific regulations or guidelines that traders should follow to ensure their trading practices comply with halal principles? I'm interested in learning more about this topic and how it applies to the cryptocurrency and finance industry.