1. https://www.bitfinex.com/posts/342 https://cafe.bithumb.com/view/board-contents/1639955
2. https://dailyhodl.com/2019/02/19/google-enables-iconic-bitcoin-symbol-on-ios-keyboard-in-new-sign-of-crypto-adoption/
3. https://cointelegraph.com/news/apple-notes-blockchain-guidelines-in-recent-sec-filing
4. https://www.business-gazeta.ru/news/413872
5. https://testnet.binance.org/