Define "last".
In a year; BTC, LTC, DOGE, DRK will still be around... along with shitloads of other dying/crippled cryptos
In 10 years? Impossible to say, but my guess is that there will be some Anon-crypto, probably decentralized (eg xc, xst, sdc... Whatever gets flawless and functional first)
BTC will probably be outrunned by some smoother, faster, more functional crypto that is designed to be a general worldwide crypto that will piss off Visa, Mastercard, Banks, accountants...
There will probably be some government/company-developed crypto around too. (Ethereum?)
Shortterm;
My crystalball tells me that the anon-crypto that manage to merge with openbazaar (or similar) will be a winner when the DarknetMarkets gets shut down/users start moving to OB.
This would be a winner with the massive and insane cashflow it would provide.. atleast for a few years.
The key would be to have the crypto easy available for the crowd. (eg pay with visa-card for crypto)
-Grg
ps.
A thing within Crypto that I never understood is why no genius make a coin "complete" before release.
To get publicity it should be released in a basic version and be updated every 2 weeks or so to keep the interest up/cashflow in.
In eg 6 months/12 updates there would be a functional, perfect coin for whatever reasons were decided when the idea of the coin originated.
ds.
edit; Trying to make more sense.