Surprised you would ask for some other field. Well, this is a crypto platform so, good luck with them suggestions that wouldn't be crypto related.

When you refer to investing 4k bitcoins, your saying you have actual bitcoins worth 4k and I suppose that be in dollars and hope to invest it or you mean something different.

Again, don't you think $100 daily is just too much?
That's 2.5% of your capital daily and that's so much without considering loses.  One thing to know for real, you will encounter loses and it might be in amounts much more than you hope to profit. You could practice holding, it comes with minimal risk.