It is not only TRON that had not reach old ATH. I saw TRON is at about 1/4 of old ATH. Reasons are two. First it can reach it latter. and second is that Tron was new coin right when bull market of 2017 started. So those levels back then was not realistic. This cycle ATH will be more accurate and dont think it can not go over old ATH.

In general Tron is just , ....