Unless you're a master day trader just buy into new coins with good vibes or new ICOs without scam rumors. Watch the charts. If the ICO dips down after trading opens sell right away, 99% of the time that's the end. Watch the forums, most all on here is self serving manipulative BS but if the FUD is constant and seems to speak to the same issues sell off right away. Set low sell orders to catch giant dumps and at least have your money back if a dev decides he wants a holiday or if a real scam is revealed whilst your sleeping.  Real tech, devs and community will make a coin last longer than the P&D crap but not forever. That said, some of the trash coins dial up their own fake buy support; these can be a nice ride but see above re the low sell orders as the scammers will always cash out sooner than later.  No altcoin has managed to provide itself with real demand from a real user base although some are trying their best. There just aren't enough people in crypto to power this and those with real money in the real world are staying well clear of this cesspool. Don't get emotionally involved in a coin: 99% of the time the dev team is justing waiting to exit at the highest point they think they can reach.  Don't do chart analysis or trust those who say they've done so: the alt markets are 100% manipulated and do not rise and fall on free market trading logic and principals.