What is the ROI on margin trading BTC or any other cryptocurrency for that matter?
Very risky if you are new into business
You have to master the art of trading before you get in there or else you may end up loosing everything in a flash... Have in mind that where there is seeming high ROI, there is also always a high risk of loosing a lot.
There is actually even nothing like ROI when it comes to trading at all, what you get is not fixed and making returns eventually will only be due to how knowledgeable you actually are in a lot of sense. Just like you mentioned, the need to master the art of trade, the need to be equipped with great deal of knowledge when it comes to the space as a whole and trading as well, is something that anyone who is new should always be considering first.
Trading is how you play the market, and a lot of it depends on the amount of capital you are risking per trade, which in this case, is directly proportional to the extent of your loss as well as your gain eventually but all still balls down to your knowledge.