Most of them will be around for quite some time, since they should have time enough for proving their existence. Be more specific! SHA or Scrypt? Either ways, sticking to the leaders will bring you some profit, if you decide to stay in the game long term. Fast breaking even results does not exists anymore since the diff is rising very fast for any named coin. If you own some ASIC miner, no doubt, stick to BTC, if you are GPU miner - stick to LTC, if you are willing to take high risk and to break even fast, stick to the leaders in coinwarz and trade to shorten the breaking even period. It makes it even more risky. Keep an eye on cryptos bringing real innovation to the market such as XPM (Primecoin). Namecoin is other undervalued crypto which deserves attention. Most important thing - behave, think and act as an investor! This will bring you success in the long term play. Keep in mind that when Bitcion becomes mainstream (maybe 5-10 years) it will worth maybe 1 or more millions per unit, so even at loss, consider to buy an ASIC just as an investment! Most important - enjoy it while it lasts! Happy mining and success!