ICX as a deflationary token

We know that the xCall service will charge fees and these fees will be used to reward relay node operators for their part in the cross-chain transaction and for buying ICX from the market and burning it.

When the xCall service is live and with wider adoption, is it such a big imagination to think that ICX can become a deflationary token? Who believes this? Any idea how much % of the fees could be used to buy ICX from the market?