21Shares launches first US actively managed cryptocurrency ETF 'TKNS' According to a report by Golden Finance, on May 14th, cryptocurrency ETF issuer 21Shares announced the launch of the first US actively managed cryptocurrency exchange traded fund, 21Shares Active Crypto ETF (TKNS), which has already started trading. It is reported that the fund will invest at least 80% of its net assets in cryptocurrency assets or related investments, and adopt a Bitcoin core allocation and diversified digital asset research driven allocation strategy.