I think so. Bitcoin dominance is too high already. Last such dominance was in December 2017 when BTC hit his AHT price. SO we should see altseasoon soon.
I'm in favor of the high bitcoin dominance while the alts are starting to grow a little by little. For those who have diversified their portfolios mostly with altcoin and ethereum, there will be the right time for it.
I have BTC and ETH at the same time so I'm happy to see that ETH moves a little by little after we saw it on $100 few months ago. Once bitcoin dominance decreases, it will flow to most alts and prolly ethereum will have the biggest increase and share by that time.