As soon as ICON staking (IISS) gets announced expect a rapid increase of value. The staking is controlled by AI algorithm so different rewards upon your activity inside the eco system.
Highest reward for holding ICX in your wallet though (held in DEX). Those who holds larger amounts will be able to vote on the ICON Republic (CREP).
ICON confirmed that they are already running DPOS models so hopefully news will be released soon.
Remember 25th September the token swap completes and all remaining ERC20 is burnt.