Here's my trading way:
1. would you buy into a coin thats rising in hope of it rising more => Mostly no, when a coin price rise considerably, I'll wait or change to another coin.
2. would you buy when its going down in hope it would rise back up => Yes, I usually do so, combining with some technical analysis.
3 what % of profit do you sell at that you see regurlarly 5%? 10%? => at least 10%, unless there's some special signal that it cannot go higher.
4 what % would you sell at to cut lost (please dont answer just hold til the coin goes up as it may never go up)=> usually 10-15%, but sometimes still hold forever and hope
5 which exchage do you use when trading altcoins that are not so popular => Binance, Bittrex
Somebody advices me to try to recognize and follow the whales in this volatile cryptocurrency market. Well, that's not easy at all, but it's good idea, right?