Almost all local currency always have lower value every year although with USD, last year you can buy one pack candies with $1 maybe next year you have added $2 to buy one pack candies, its called with inflation with local currency and bitcoin can increase your saving value and keep profitable if you want make bitcoin as currency digital payment and you can get much profit every time.
Inflation is within the tolerable limit now, even in the developing nations. For example, in India we used to have inflation rate up to 14% a few years back. But now this rate has got reduced to around 4%. This has made the usage of fiat currency as a store of value possible. At 4% per year inflation, the purchasing power of the currency will get reduced by 33% when compared to 73% in the earlier scenario. Now 33% is not a very good amount, but it is still tolerable in my opinion.