That's the best thing about crypto that we don't need any minimum amount. We can start trading with as cheap as $10. Although the initial investment decides how much profit we are going to make. You can't expect to get $1000 by investing $10 in a short time. I would recommend you to invest atleast $100-$500 to get a substantial amount of profit while trading different coins. Keep in mind that trading crypto is risky and any amount invested could result in $100% loss.