Based on my analysis, i think that it is better to be super attentive on Altcoins. 1- Dominance is in a very sensitive zone, 39.8% is a strong support 2- If it bounces above this support, the Alts will bleed 3- If it bounces below it, the Alts will continue to rise. BUT, The dominance had been decreasing for more than 40 days , and most of the Alts went crazy. SO, I think that most traders made a lot of profit with Alts, & in my opinion, it is better to secure your profit, and sell your Alts positions ( except the one you are holding for a longterm), and hold a big bag of USD.
The probability for the dominance to go below the support is low, so i believe that it will bounce back, and the Alts will go down, and we will have the chance to buy more Alts for a discounted price.