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!
Tether is really very important. Traders need Tether to hold and wait for the opportunity to trade. I usually trade through Tether and never hold any other altcoins.
Its advantage is price stability and we will be safe to hold it.