What is the cheapest platform for day trading crypto?

I'm curious about the cost-effective options available for day trading cryptocurrencies. Could you please elaborate on which platform offers the most affordable option for day traders? I'm specifically looking for a platform that not only has low trading fees but also provides good liquidity, user-friendly interface, and a reliable security system. Additionally, I'd like to know if there are any hidden costs or limitations that I should be aware of before making a decision. Your insights would be greatly appreciated as I aim to maximize my profits while minimizing expenses in the world of crypto day trading.