Trading and signature campaign is not either permanent. There is always a change in trading just like the price of bitcoin and in signature campaign you don't know when the campaign will remain and how long it would stay.
of course trading will last a long time, depending on bitcoin. if bitcoin live very long, as well as trading.
signature campaign is not permanent, but you can benefit from this moment, when the signature campaign is still very much at a rate that is high enough
Yes signature campaigns are not permanent but it will still depend on the company of how long is he going to advertise his campaing/ company.
It won't be permanent but it can be for a very long time.
If one signature campaign ends there will be other campaign that will take care of us, so we don't have to worry about that, everything depends on the price of bitcoin.