Yes, if somehow Bitcoin reaches or crosses $100k value then most of the altcoins will form new ATH's multiple times.
In theory, if Bitcoin can reach $100k, most investors will be optimistic with crypto future. There will be significant increase of demands on the market. This probably triggers an altcoins season, this is the time that most altcoins to skyrocket. However, we don't know how far each altcoin to increase, it will depend on the demand on the coin itself.
I'm expecting to see new ATH's of TON, BNB, SOL, ETH, LTC, DOGE, and many other good altcoins.
BNB and TON already reached their new ATH in this year. I'm not surprised if these coins won't increase very significantly even if we have an altcoin season. But I'm very curious with ETH, SOL, and Doge. I'm sure these coins potentially increase very significantly in altcoin season.
I'll surely be taking profits when my assets move up by 50% or more but I'm pretty confident that most of my holdings will reach or cross 100% if Bitcoin reaches $100k.
I also the same as you, dude. I will take profits when my assets have increased 50%. When Bitcoin can increase to $100k, we must decide to sell our Bitcoin. Let's hope it won't bring bad impacts because it will trigger huge supply in the market.