Stablecoins VS Traditional Cryptos for "Digital Cash" Purposes?

In one of his most recent posts, cryptocurrency blogger Scott Cunningham made a fantastic presentation demonstrating why he consider BCH, LTC, and DASH to be the top three cryptocurrencies that could function as a form of digital cash. While Scott's video covered "real" coins with their own dedicated blockchains, I believe that stablecoin tokens (which run on top of existing blockchains) also have a key role to play in facilitating day to day purchases. In my post, I will discuss the top three stablecoins, the advantages they have over traditional cryptocurrencies for day-to-day transactions, some of the differences between them, and some considerations that may be important when deciding whether to use stablecoins or traditional cryptocurrencies as a payment mechanism.