Irrespective of all you just highlighted in regards to the so called established altcoins, they're still inferior to bitcoin and that's a major disadvantage all altcoins will have forever. Bitcoin is just one therefore the trust level associated with it plus an additional 10 year of been profitable, it must have definitely earned all the trust it's getting.

Altcoins get traded against bitcoin meaning most of them can't stand on their own. Altcoins are mostly bought with the intention of selling at the quickest profit possible therefore when even there's a news that can hinder that plans, the Investors panic and sell off their investment.