Some new entrants in cryptocurrency trading do trade blindly on coins without doing their research on coins before investing, majority invest base on FUD or a pump group which are not realiable.
The following are some of the factors to consider before investing in coins base on long terms investment:
On-going Projects
Community Hype
Market sentiments
Future projects
Social media reach
It is true, you must only invest if you have done a thorough review on a coin's whitepaper and have checked everything you have to check. Investing out of FOMO is really not a good idea since most crypto investors would do their best to market and pump the coin they are supporting.