TL;DR: Welcome to In Case You Missed It (ICYMI), a daily crypto news update. US lawmakers ask Libra to cease development. Cuba is studying cryptocurrencies to evade sanctions. UK FCA considers a cryptocurrency derivative ban. Binance switches to Ethereum-based Tether. Banco BTG Pactual to use Tezos for Security Token Offerings, and the post Hayes-Roubini debate about the debate rages on social media.