I dont know how high it will go but that is how low it will go. Just a humble call made purely via pattern extrapolation. Since you so strongly believe it will not happen, that is exactly why it's going to happen. I have no further arguments.
You could be right, and i think that in the end this rally will end, there will be a bear market for a while before a new round of rallies probably in the years 2020-2021. But your figure of "at least $3k" seems unreasonable for me.
This is no 2013 here. The rally has been going on for way longer than the 1 month it lasted for in 2013, in fact it's been a year since the start of the rally.
This slow yet consistent buildup means that when the crash does come, it won't be as brutal. I doubt it'll go below $4k at all actually.