You are talking to yourself and talk is cheap. Post evidence of your own skin in the game or shuffle off.
I would repeat caution to anyone reading this. Any form of leverage is an extremely good way of losing all your capital. Those who have actually been in the markets or traded with any degree of risk management or attempted capital preservation know this too well.
Indeed leverage is risky. Nothing is entirely free. Selling to dollars is much safer.
Nevertheless it is one of the least risky bets (if excluding exchange default or theft risk) I've seen in a long time[1], assuming you post enough margin to not get stopped out. I preferred the short at $315 than $283. But it is still has good risk vs. return. If I had shorted at $315 with $70 margin as I intended, then I could have reduced my margin already to about $50. And continue to reduce it towards $0 as BTC declines, so that can be used as working capital else where. Or enter more shorts on the way down to increase leverage. Of course more risky if increase shorts on the way down.
All BTC that is due to me was sold to dollars, approximately $30,000 worth. I don't need to prove that. Any one who can prove I lied about anything, go report a negative reputation on me.
[1] the reason I say that is because the Euro is preparing to gap down starting roughly in September or October. Or you short the Euro. I didn't run the numbers on that. I had BTC and needed to make a decision on my BTC. I don't have a brokerage account any more.