bookmaker.XYZ is an Azuro Protocol front-end operator. Azuro Protocol supports 4 chains, the following guide will show you how to get ETH and USDT on Arbitrum.
The Azuro liquidity pools on Arbitrum are comprised of USDT and all bets are placed, and redeemed, in USDT. USDT is a stablecoin pegged to the US Dollar 1:1
You will need to obtain ETH and USDT to place bets on bookmaker.XYZ. ETH is used to pay gas fees and USDT is the currency used to bet.
Option 1 - Buy ETH/USDT on a CEX
Buy ETH on a CEX (Centralized Exchange) such as Binance, Coinbase, KuCoin, etc. Please check on your chosen CEX if they support Arbitrum.
CEXs differ in what chains they support and some do not support certain chains, or withdrawals, depending on the asset. Check out the guide below.