The good thing about cryptocurrencies is that anybody can trade cryptocurrencies and can start with any amount.
But obviously it won't sound logical to start trading with $1 would it ?
So in order to start trading at least consider to invest $50 and see how it goes.
Most traders don't have a good beginning but then earn good profits as they go along the way.
Only experience can make you better. Start with little and increase the capital when you start earning good profits.