The blockchain technology use block rewards for miners, masternodes or coin holders PoS.
Usually hundreds of thousands of coins are generated in short time, few months due to block rewards.
This make many coins and blockchain technology have an internal nature trending more to coins devaluation.
Exist any blockchain technology that fight against block rewards and prevent the devaluation problems while at same time don't relax the blockchain decentralization and security?
Is there really a problem with having block reward though? It's essentially an incentive for the miners to keep the network going.
You seem to be extremely concerned with the inflation that these brings by, and I can assure you that it has minimal impact. Firstly, the percentage that the currency base is growing is very controlled, and much less than a lot of what the fiat currencies around the world is measuring in at, especially when you consider the fact that coins are being lost on a daily basis that will never be recovered (unless through brute force, which is very unlikely).
Furthermore, short term pricing have more to do with demand than the supply. The value of BTC will reflect the sentiment of the market, more so than the supply of coins. In the long run, there is a cap on the amount of BTC that can ever be mined, which makes it in fact a better store of value than fiat currencies.
It's really a non-issue if you ask me. And it certainly doesn't warrant centralised intervention, when you consider that this emission system was designed to be here in the first place.