a friend of mine wants to buy rvn. it will be there first crypto purchase and have no btc, just $$$. ...
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The, go to GDAX (CoinBase) to buy bitcoin with $$
https://www.gdax.com/trade/BTC-USD..
Just be informed that Coinbase holds the purchased crypto a week prior to releasing them to your account.
If you buy with a debit card it goes through instant.