I strongly disagree. Botox is used almost entirely on the upper face; Artecoll and other dermal fillers are used almost entirely on the lower face. They are complementary, not competitive.
Botox does have looming competition, but it’s from newer and better botulinum toxin, not from fillers.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”