Look like the Btc is unstoppable, have sense invest in altcoin in this 2 month? Anyway wich alcoin can have a better growth (exept fork) then Bitcoin?
there are a lot of coins with possible significant growth, I advise that you look at the coins market or could also get information in this forum and just by joining campaign bounties which ended up successful. i think deeponion is a good choice for investment so as gulden or electra just because they are established but still with low price.