I have been investigating the possibility of doing an SMT in order to support a trust-less decentralized system.

Since HF 20 has not even been released, that's not our immediate development priority. Anyone 'pre-selling' an SMT before the code support for them has been added to the blockchain protocol should be treated with extreme skepticism... especially if the pre-sale is using STEEM or SBD and not an ERC20 or other token that would convert into the SMT after launch.