Any use for coins/tokens of defunct projects like Synereo/Hyperspace (AMP) and others?
Nothing, nada, zero you just have to get used to it, I have over 30 useless tokens in my wallet and I just go on, nobody is buying a useless token if there is no market anymore, gone are the days when you can create a token and people will be coming in to partake of that coin, it's over now, investors are wiser now.