Which trading is most profitable?

Could you please elaborate on which type of trading is considered the most profitable? Is it the trading of stocks, futures, cryptocurrencies, or perhaps forex? What factors determine the profitability of a particular trading strategy? Does market volatility play a significant role? Are there specific indicators or tools that traders rely on to identify profitable trading opportunities? Additionally, how does risk management contribute to the profitability of trading? Is it possible to consistently achieve profits in trading, or is it more of a risky endeavor with varying degrees of success? Thank you for your insights.