Crowdfunding platform Indiegogo has listed its first security token offering. The $18 million sale of Aspen tokens, which represent partial ownership in the Colorado based St. Regis Aspen Resort, is part of a platform launched by Indiegogo in 2017. Sales will be opened to accredited investors only and can only be traded only be through an SEC-registered alternative trading system operated by Templum Markets, who is overseeing the ICO in partnership with Indiegogo..