To purchase TERN on the majority of the cryptocurrency exchanges, we will need to have Bitcoin or Ethereum to trade with. In addition based on what i read that we can easily purchase either cryptocurrency at Coinbase using your Credit Card or even Bank Account.

That is common on the market exchange, purchasing one token or coin will be needing Bitcoin or Ethereum, The most reliable benefits of blockcard is that we can use it in other platform such as bank , credit cards to purchase from the market.