When I am researching what should I look for ? I mean what points or issues etc ? what are the important factors you look for when you research before investing in a coin for long term and for short term ?
Apart for obvious "a good team", "representative website" etc. I think it's important to check the roadmap - it can be a decisive factor for short-term. Because some coins are good with decent ideas behind them and stuff, but their price is relatively static, because well, nothing much is going on, they are not moving forward (examples: Ripple, PTOY, SIA in a way), which isn't a problem for long-term but can be a bit frustrating if you trade more often.