Experience, knowledge, a working strategy, and of course capital, and when I say capital, I mean A LOT of capital.
$2,000-$3,000 monthly profit needs a huge amount of money depending on the amount of knowledge that you have, and the amount of leverage that you will be using along the way. Of course, you will not get that profit when you're doing spot trading so you will go futures trading. It's doable, but you need the things that I said. As for the strategies, there might be some here that will share their strategy, but it doesn't guarantee that it will also work to you. Trust me, I also tried mimicking the strategy in futures trading that I watched years ago, and it didn't work for me for reasons I don't even know.
Good Luck, and I hope that you have lots of capital to start with in order to achieve that goal of yours. I also hope you're experienced enough as well.