I discovered that the best time to invest in a token or any altcoin, is when there is news of an important development, most especially when it is just a rumour before the news, because people sell news.
Then when there is FUD and the token has dump, you can also buy the dump. Although, this is best for an already established coin.
you are right,, "buy the rumors and sell the news" is an old quotes my friend
usually when the rumors coming, the hype will follow and this will make the price growing,, and when the news show up, the power from the buyers getting low, wich mean sellers will win the battle and thats will causes the price down
also do not forget about technical analysis buddy, because you will know when the right time to buy and when the right time to sell using technical analysis
about Enigma, i don't think this coin will be the next eth
regards