This is an important topic to cover early enough.

What I'm going to do is liquidate the alts I have before Bitcoin because they're more volatile.

Deciding on fixed sell-zones and percentages for each asset makes perfect sense. If BTC underperforms, then continuing to HODL will not matter as much. Then you'll just meet those goals in the next bull run. If it overperforms, you'll have at least a bit left to sell.