Thanks for your question.

 If you take a loan in fiat money secured by ETH or BTC you should pay back in fiat money. If you use BTC as collateral to take a loan in EUR, you will make monthly payments also in EUR.   

In case if you buy mining equipment by installment you can make monthly payments both in fiat and using your mined cryptocurrency.

Cereal does not provide loans in cryptocurrency  secured by other cryptoassets because of the high volatility of the market and the difference in rates.  At the current level of the cryptocurrency market this product carries high risks for both the lender and the borrower. In the future, if crypto-market has some reliable cryptocurrencies with a stable exchange rate, which can be easily converted into fiat or used to pay for goods and services, Cereal will consider a new credit product in cryptocurrency.

Best,
CT