I'm afraid to sell UST because it could recover to $1
That's unlikely. If it was possible to get recovered, we wouldn’t see Luna Classic and Version 2.0. Also, for your info, Luna Version 2.0 is another of the same quality product as it was. This will also have the same future as of the old Luna. Be careful, you better sell your UST and get $1 as in future, they are most likely to get more devalued.