I don't think I would trust either of these categories:
- brand new exchanges or exchanges that haven't been around for a few years at least
- traditional markets like forex who decide to do crypto also because they know it's the competition
I like Kraken for leverage trading, they have been around since 2011 which is 1,000,000 years in the crypto-world... Time is something you can trust.
That stands in stark opposition to the typical desire of the Crypto community: mainstream adoption.
Regardless, the platform has been servicing cryptocurrencies for some time now. It's different from an exchange, like Kraken, since it offers derivatives, which can offer a lot more leverage, and that too on a wide variety of pairs.