Not a good plan, most people have done this and in the end they would have done better if they held the first coins, the thing is it's not easy to find gems.

If one project give you 10x return it is not even an altcoins season yet, it is good to take some profits off the table but it is likely goung to be a bad idea if you invest all that money into another altcoins, because they might not perform very well.

A gem is a gem, when a full alt season starts they will blow through the roof, and your newly selected altcoins might not do very great like the first picks, stop jumping from one to another project.