Based on the present state of the market, I will agree with OP that it is the right time to get into alts in preparation for the alts season to come, history has a way of repeating itself, we are hoping to see some amazing surge in prices of alts anytime soon, I will advise you to get into solid alts now.
Find the right alts to invest your money, chances that once Bitcoin stop pumping and find itself a good barrier alts will start to pump up, those many investors around who gained decent from this current rally will find diversion to place their earned money, make sure to follow quality alts who have real contributions to this industry.
Bag it up and wait till the market move itself and start to bring you good benefits.