Bisq is a unique kind of exchange. Similar to the way Bitcoin itself functions, Bisq provides a decentralized, peer-to-peer network — by way of an open-source desktop client — for trading both fiat and crypto-currencies. The downsides are much lower liquidity than large exchanges, trades take longer, and some technical proficiency is required (it's not recommended for beginners). However, for the patient crypto-investor, Bisq provides a privacy-friendly, decentralized bridge between the fiat and crypto worlds, in the ethos of Bitcoin itself.