TRON has been developed for the digital entertainment industry. Within this industry are online casinos, games and social networks. This industry has a worldwide market value of 1 trillion dollars. The TRON protocol enables everyone to publish, store and manage their data in a decentralized manner. They want the makers of documents, music tracks and games to be able to keep their management and distribution in their own hands and this makes it possible for everyone to adopt this currency and makes it indispensable among other currencies, did you believe that Tron could be the next big deal after ripple? 
All the main stages of the project are already behind and the coin has gained exactly the value that is worthy for today. Accordingly, no growth in 2018 can not be observed, because all of its projects the company has already submitted. So it is not worth investing in it either.