To purchase SmartKey using Bitcoin or Ethereum, you need to first transfer your funds to an exchange wallet such as KuCoin. After verifying your address, click the “Confirm” button and select the “Trade — Spot Trading” option on the KuCoin website. In the right column, locate the search bar and look for the SKEY/ETH or SKEY/BTC investment pair, depending on your currency. Select it from the options provided and place a market order to complete your purchase of SmartKey coins.