To" trade cryptocurrency " you need it to be. Other than trade. You can either buy it or you can mine it. I do not think that mining does not require investments. Learn about mining information. But remember that there is no easy money.
Of course trading crytpo is need the capital, We can't trade without capital,
the greater capital we use then the great advantage we get too, or vice versa.
Having a large amount of capital won't do if a trader is not a good regular trader. It doesn't matters how mich you use to trade as long as you can make money in any amount that you trade. Trading is always needing a capital for you to buy so it was nearly impossible to have no capital.