Cryptocurrencies and primarily Ethereum backed ones create new modes of earning interest. What was once an ICO backed increased adoption of cryptocurrencies - after being hyper-regulated, and banned by countries, has now transformed into an economy of regulated less riskier Decentralized Finance.
The premise for earning interest in cryptocurrency markets is simple, and below I list a few means to do so* . As a disclaimer, users who choose one of these means do so at their own risk.
Crypto-Exchanges and Margin Trading
Writing a crypto-exchange allowing traders to trade coins in exchange of small commissions per trade. There are more than 100+ decentralized exchanges which use smart contracts to swap one cryptocurrency to another. This approach needs deep expertise in a variety of areas including cybersecurity. The list of known ones is here (State of Decentralized Exchanges)
Margin Trading - On exchanges such as Poloneix.com users can lend their HODL-coins to others who trade on their behalf.
With applications such as compound.finance, nexo.io, celsius.network and a host of others, users can invest their HODL -coins and earn interest off those coins based on rates determined by the network. These applications provide extremely high liquidity and enable users to withdraw the very same day.
Staking networks
Cryptocurrencies such as Tezos enable users to delegate their Tezos to bakers, who pay them interests. In fact, staked.us provides support to stake more than 10 different cryptocurrencies.
Collateralized Debt Bonds using Maker Platform
The Maker Network and crypto-platform enable users to set collaterals in their own bonds such that their existing crypto-currencies (e.g., ethereum, augur, etc) can be baked from the maker platform. The smart contract which locks the users' cryptocurrency then issues a stablecoin known as DAI based on the existing governance rates of exchange. This DAI can either be invested in other DeFI platforms or can be locked into a savings platform through a Dai Savings Rate contract thus enabling them to earn interest on existing Dai holdings.
Posted from my blog with SteemPress : https://www.cryptonewtech.com/2019/12/09/earning-interest-while-you-hodl/