Tether CEO aims to allocate up to 15% of its portfolio to gold

By Polina Devitt LONDON, Jan 28 (Reuters) - Tether plans to allocate 10%–15% of its investment portfolio to physical gold, the crypto group's CEO Paolo Ardoino said, adding to the ​bullion which it says already backs some of its products. El Salvador-headquartered Tether said it ‌has about 130 metric …