Btc has run too far too quickly possibly due to manipulation by hedge funds. But it wont crash too hard I think. By guess is undervalued alts will rally hard now. Just a guess
Yeah,I think it is the time because some of the altcoins with good potential is still undervalued.I hope the year 2018 will be the year for ETH and LTC.Already these both coins showed us good growth rate,but I think it is just a beginning in some years ethereum price will get expensive.
But don't invest on only one coin because there is high risk in crypto currency prices so invest on different coins to make safety for our investments,if one coin fails to increase other coin will manage it.
I think eth is just doing fine since it gave many roles to many erc20 tokens in the market. LTC on the other hand is somewhat still slow in the market but their could be a chance that it will increase more in price. Since bitcoin is overvalued, a lot of traders now will find cheaper and lower altcoin to invest in while hodling or using bitcoin just for mining.