the facts is that bitcoin price has been at the bottom and every attempt to dump it any lower has been failing miserably so far. and meanwhile the altcoins are continuing to get dumped more.
if any signal is true it is the signal saying you should be accumulating bitcoin while staying away from altcoins for now.
i personally am still trading the coins that are getting pumped every day but if you want to start investing in altcoins at least wait for the bigger obvious pumps to begin then invest not now that there is still dumping going on.
I personally have never believed at some point though that altcoins are meant for long term investments, considering the rate at which they always come back to their historical bottom over time, and I see them always as a pump and dump market, but for some solid projects, and the rate at which the alts have gone down hugely, I would say it is better to still take advantage of those solid ones, while still making bitcoin a priority in the long run.