I don't make the rules on Xotika. I can only tell you what they say...however maybe in the future they will implement another payment option, but right now i prefer if they would focus on building the site more and make it better instead of focusing on implementing other crypto coins.
Also, this panel was not about Xotika, it was about how bitcoin and other cryptocurrencies are gaining popularity and becoming a trend in the adult industry, more than ever...last year at the same summit no one even cared so much about it...and this year it was all everyone was talking about.