Don't get me wrong, I'm a strong Bitcoin believer for the long run. However, I'm starting to learn about swing and day trading and I would to have a option to short sell crypto for this purpose. Which is the best exchange (good volume, good reputation) to offer that option?
Until you become more familiar with derivatives, I recommend leveraged spot trading on Bitfinex. Hands down the best UI for a beginner margin trader. If you're from the US, then Kraken is probably your best option for that.
For derivatives trading, I would recommend Deribit over Bitmex to casual traders any day. If you're from the US and are worried about getting KYC'd then I suggest Kumex. I actually like Kumex a lot, but only for smaller positions like 10 BTC or less.
I suggest keeping your leverage low (2-3x max) and minding your stop losses. Don't go blowing up your account.
