It is a possibility!
Tether wont even be ranked on the top 500 a year from now!
Currency pairs are on the way!
Bitcoin will also suffer from currency pairs because it will become obsolete: Think about it!
Market dynamics will change!
I don't even know while exchanges are trading tether in the first case. If their terms and conditions states that they are not under any obligation to redeem tether for real cash. Exchanges should all trade fiat directly and delist tether.