Cryptocurrency with less deflationary properties
It's technically possible to have a blockchain with any generation schedule, such as X% inflation per year or constant reward per block.

The main reasons for a schedule with an upper bound is:


The Austrian economics school, to which apparently Satoshi and a large part of Bitcoin's early adopters subscribe, says that the optimal situation is that the monetary supply is bounded.
If you want to have some long-term inflation you will need to choose what it is, and any choice will be arbitrary. "0% inflation" is a bit less arbitrary option to anchor on.
One of Bitcoin's key properties is that the monetary is supply is not manipulable, and it's perceptually easier to sell it on this point by saying "The protocol guarantees there will never be more than 21M bitcoins" than "The protocol guarantees that in the long term, there will not be more than 3% monetary inflation per year".