The last ATH and the crash that followed had many other, non-chart signs - the fees were high due to a huge network activity, as people were moving their coins in and out of exchanges, Bitcoin reached ATH on Google trends, the media all over the world were talking about Bitcoin, even on national television. There's nothing like that right now, so it's not the top of another bubble yet.
With most of those metrics, it looks like the
beginning of a bubble now. Google Trends looks an awful lot like the May-October 2017 period before it went parabolic. Fees have been trending upwards since the beginning of the year too. I guess we got Trump tweeting about Bitcoin, but yeah, certainly not the everyday hype coverage of late 2017.