Crypto currency has a substantially lower cost per transaction than credit cards. As such crypto is likely to start replacing credit based transactions. This section will list links to resources related to crypto currency.
Coinbase (*) Coinbase is an exchange that allows you to buy and sell select crypto currency. (NOTE: I use this program. I might get a bounty for people who sign up with this link.)
Bittrex.com (bittrex.com) - review Bittrex is an exchange for trading crypto currency.
CoinLore (www.coinlore.com) CoinLore shows the price of leading crypto-currencies.
CoinMarkets.today (www.coinmarkets.today) This site by Penguin Pablo provides a side by side summary of popular crypto currencies.
Coin Logic (coin-logic.com) Coin Logic examines the growing crypto market.