However, this achievement was slightly tarnished due to its downward trend.
I don't doubt that's actually true. The revolution bitcoin has created and development thus far can't be tarnished, not even by the down trend.
Lately it has been difficult for Bitcoin to attract new buyers or even retain old buyers who are mostly disappointed with the price.
It can only be said only for those who are either shortsighted at technology or Are in it solely for the temporary benefits. 70% Of those you refer to as "Old buyers" are probably from mid 2017 and I would rather refer to them as opportunist.