Usually the mild skeptics are the last to jump onto a bubble, because they give in after reading articles like this and decide that the price can only keep going upwards.
It also contains a couple of remarkably naive statements such as:
bitcoin has been much manipulated but as it grows, manipulation opportunities are disappearing.
The author's argument here ignores the fact that market manipulation is conducted on gold and a lot of quite large markets. It also ignores the fact that a surprisingly high or surprisingly low price can always be the result of market manipulation.