A new crypto exchange called Blade will go live in a few weeks according to TechCrunch. The exchange, which will offer perpetual swaps, raised $4.3 million in a seed round from Coinbase, SV Angel, A.Capital, Slow Ventures, Twitch.tv co-founder Justin Kan and Quora co-founder Adam D’Angelo. Blade plans to offer a variety of trading features including leverage as high as 150x on BTC/USD and BTC/KRW.