How much ETH to stake?

I'm considering staking Ethereum, but I'm not quite sure how much ETH I should stake. Could you provide some guidance on this matter? I'm aware of the risks involved and I'm willing to accept them, but I'd like to make sure I'm staking a reasonable amount based on my financial situation and the current market conditions. Is there a recommended staking amount or a formula I could use to calculate it? Additionally, how does staking ETH affect my ability to trade or use it in other ways? I'd appreciate any insights you could share on this topic.