For me the most important reason to choose a good coin is the idea , vision and mission about the project , its very important to attract more investor and coins buyer , read the white paper page per page and make sure they had good and experience team behind the project .
To me i think that it is not so easy to get information about the market, for that we need to have good knowledge and study about the market and may be then we can become able to get some good information about the market and bitcoin price that either it will increase in future or will decrease.