As you know you can issue tokens on many popular platforms like ethereum, tron, waves but steem offers a lot of advantages where these platforms can't. Steem has thousands of users where you can easily promote your token and project to the people who are educated about the blockchain. If you can create a useful or entertaining services then people will buy your tokens to try your service. After issuing your token it will be tradeable on the decentralized exchange where you don't need to pay lots of money to get your token traded on a exchange. Now it's great time to issue your token on steem because there are less competition right now and it makes easier to promote your token.
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From @sm-beta