I don't think this token will reach its ATH now that we see more tokens are worth investing that DENT. That should be in your mind wen it comes to investing, not just because it had gone been there before. So look at how much had change since the time DENT started. Mobile data are bought cheaper without the use of dent tokens.
And they unlocked a lot of tokens since this time (when price hit ATH). And this is only 50% in circulating right now.. seems they will unlock even more tokens soon...