I think that Bitcoin will start growing soon, but because of the big dominance, alts will also be on the bottom and will not be able to grow much
There's a big competition in the market and bitcoin and altcoins are really competing and as long as BTC holds the most dominant volume in the market, it will always dictate the market. its' still now dropping below 50%, current dominate rate is 66% so there is no room for altcoins to grow at its dip price now.
We need to see an altcoins run or altcoins season in order to see some improvement, until that time comes, investing in altcoins is very risky.