The euphoria and bubble surrounding bitcoin and altcoins today mean that you can’t apply standard investment advice or analysis to guide your decisions. I believe that one of the inputs that needs to be added is hype (buzz) level.
Spikes in hype will alert you to potential important events – either positive (buy more) or negative (sell before it drops). Because general talk will gradually increase, but if there’s strong development, positive or negative, these charts will show a spike.
Bitcoin & Altcoin hype charts (Google Trends)