Here are some interesting Bitcoin loan and exchange services:
CoinLoan allows you to get loans in USD while continuing to hold your digital assets.
tBTC is an ERC-20 token on Ethereum. It is trustlessly redeemable for Bitcoin (BTC). In other words, you can deposit Bitcoin and mint Bitcoin tokens on Ethereum without a middleman or identifying yourself.
RenBridge a decentralized application (dApp) that allows you to mint BTC, ZEC, and BCH on Ethereum as an ERC20 token (renBTC, renZEC, renBCH). You can = convert these ERC20s (renBTC, renZEC, renBCH) back to real BTC, BCH, and ZEC.
FixedFloat is an automated digital asset exchange that uses the Bitcoin Lightning Network.