devaluing is loosing value, deflation is the opposite.
why is saving money regarded as a problem? People will spend money only on stuff that improves their life enough, where is the issue in that? And the economy will not halt just because people will want to save money more, people will still spend money to buy what they need, the main thing that will change is people’s time preference, that is people will plan more into the future, rather than think only short term (which inflation encourages).