I believe that the time will come, slowly the altcoin starts to crawl up now and my hope is that by the end of the year it will be like this last year. The number of short positions fell to a historic low.This suggests that the bears have exhausted their strength, and perhaps soon we will see the growth! I hope so.
That only happens when the bitcoin dominance is actually down. When people feel that the value of BTC is too high, then they will look to the alts to start pushing prices to create a balance. The same goes for 2017, when the alts grew a lot. alts' season will certainly come but it is also quite far, because this halving event of bitcoin will affect quite a lot. People will spend their money to buy more bitcoin instead of buying alts. Capitalization will once again focus on Bitcoin, this time dominance will be around 73% - 76%.