The magic number for definite de-adoption of a currency may be somewhere above $7 per tx. This is what it costs to transact in the stock markets. Or above say 10%, perhaps an expected return from the stock markets. Or above the 3% credit card take, or money wire take, or other in/out costs. Or below business ventures. Or above the petrol money to go buy in poker and beer at your mates vs satoshidice. A lot of traditional investors, retail, and users who don't get the whole crypto gold storage anarcho digital adoption entrenched thing are going to be looking at it in those terms. If it wasn't for anarcho theory, BTC might have died as soon as its mempool was foregone. BTC has high fees, internal issues, no privacy, and significant advanced competition now. If those issues aren't resolved any survival of BTC will be based purely on stupid goodwill. While BCC may address the first two of those and earn itself a flippening, the latter two remain with as of yet no roadmap out. We now see webmarkets and payment processor API's evolving to support more than one coin. This will put even more pressure on BTC / BCC from the advanced coins to the point of further leveling, or even flippening them both out long term. (They're at a combined 53% market cap now.) Keep your eyes on the strongly private coins, the feature / compute programmable / application / AI coins, the cartel coins, any coins that solve a lot of todays coin deficiencies in one coin, and whichever coins have stupid mass bling appeal. People can probably suggest and wager which coins are leading and or upcoming in each area.