So we are talking about the so-called first smart token. At the first half of 2017 it was doing good but after that it became a bit dull for some of the people. So suggestion would be it's not bad, but little bit or more study on it could be awesome for you, if you are into this token.
as you said, Tether's price is always (99% of the times) equal to 1 USD. which is definately convinient. but as it is a centralized coin and i am among those people who love to hold. so it's bit tough for me to play with.
Crypto market is now popular among people. But banks are against crypto because they feel if crypto does well in the market they will lose public demand. But i think this situation will be change and bank will support crypto.
Bitcoin is the best digital crypto currency in the world. Peoples are connecting with bitcoin and they are earning lots of profit from this. That's why i think its creating a positive impact on world economy.
Firstly they make a good website for connecting with people .when people are think this project is good for them then they started invest on this project. When ICO fulfill their profit they finished.