In first few years inflation in Decred is very high, see this: https://dcrstats.com/subsidy
So if you are not doing PoS-mining, you will most likely lose some funds in BTC equivalent. The good thing that you can earn more money in PoS-mining and you don't need a hash power for stake mining. But you will need to spend some time to learn how it works in Decred. The good place to start is this small stakepool FAQs:
https://stakepool.dcrstats.com/faq and, of course, the official documentation: https://docs.decred.org/mining/proof-of-stake/