If it was deflationary on each transaction, with a rate of 2.5% of each transaction, but the main purpose of the token itself, as you stated, is not for day to day transaction, thus encouraging holders to keep holding long term, how will it be constantly deflating? Everyone is holding, as suggested.
There will be a demand for the token, it will make it valuable and useful to encourage transactions. For example, dApps with the sole dedication to making Slicer valuable and attractive.
This app will, utilize your token as its native token to be able to work, like for instance an e-wallet, or a less extreme example, a voting app, or a transportation sharing app, ultimately an app that will encourage day to day transaction, or if you may, a pay-to-run app? Which lead us to a Schrödinger situation. Does the project encourage day to day tx or not?