OKEx

OKEx is one of the top cryptocurrency exchanges and trading sites. You can use OKEx to trade spot and simple options, in addition to margin trading, perpetual swaps, futures, and options. Most of the cryptos are available to be traded with perpetual instruments and up to 75x leverage.

You can buy crypto directly from OKEx as well.

They do also offer a range of other crypto-related products. This includes a DeFi Hub.

Instrument categories: Futures, Margin, Options, Perpetual, Spot

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Deribit

Deribit offers cryptocurrency futures, perpetual and options trading with up to 100x leverage. I believe you can only trade Bitcoin and Ethereum instruments here. At the time of writing this at least. Deribit informs on its website to 90% markets share for ETH options and 80% market share for BTC options.

Instrument categories: Futures, Options, Perpetual

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