What is the ROI on margin trading BTC or any other cryptocurrency for that matter?
This is a dangerous transaction and many people have committed suicide because of losses. This is a gambling game. This game is very popular but it will cause huge damage to your market and capital. When many bets are right, the whales will change the market in another direction so that they can make a profit.Personally, I do not always encourage new traders to go the marginal way, as that can result to a terrible one, but the most important thing is never to approach trade without any knowledge or strategy as that could actually be an equivalent to committing suicide like you said.
