We should sell such outdated coins like Tron because such coins will become more and more obsolete over time.
There are many of them which I have no interest to mention any of them. People can just go through the exchanges the old coins are listed and see how disappointing they are now. Many of the new coins now will also become old and not get to all-time high when bitcoin is getting to all-time high. Altcoins are like pump and dump. The ones that are successful now will later amget to all-time high which means if you make money from altcoins, sell them and do not expect their all-time high again or for a long period of time like decades.