[thinkmassive]

Many altcoins attempt to solve the confirmation time problem. Litecoin is an early fork of Bitcoin that reduces the target block time to 2.5 minutes (probably still too slow for your coffee purchase). One that I see as having a lot of promise for retail purchasing is Dash[1]. They claim 1-second confirmations with InstantSend. I'm intrigued by the masternode network because it seems like the best compromise I've seen for gaining fast confirmations while maintaining most of the distributed and decentralized aspects of a good cryptocurrency.

Bitcoin is the largest and most prevalent, so it has become the currency most often used to exchange to fiat. Usually the transaction fees are still mostly negligible because these are larger transactions than the faster altcoins when they're used to make purchases.

[1] https://www.dash.org/