Arch failed because the dev. just got frustrated I don't think so , he seen the volume and just clicked the sell button that's what happen ,,,purely just gotten tired of it doesn't cut it that's an excuse for failure, he failed the project  and ran out of funds and that's that so he refilled his account and there will be another coin like always coming out with a flashy introduction again and we will invest again , again , again ,so beware what you invest in ,