These HoloTokens (HOT) are available since july 2018 on the Binance exchange platform and since February 2019 on Bitrue. You can buy them from Bitcoin with the HOT/BTC pair and from Ethereum with the HOT/ETH pair but also from Binance Coin HOT/BNB or from a stable Coin HOT/USDT or even from the Turkish lira HOT/TRY.