In my opinion, it is better not to liquidate your bitcoins. If you want to invest in altcoins you better use a small number of your bitcoins to buy some altcoins which have strong fundamentals. No one knows for sure if bitcoin has reached its peak, it could be that in the future the price of bitcoin will continue to increase. therefore it is better for you to save bitcoin
we have to select which portofolio will get biggest allocation from total capital in our bag. Bitcoin or major coins should get biggest portion, personally i am prefer 25% in bitcoin and 75% left spreaded in major altcoin such as eth bnb sol and some in new project that i researched and deeply analized before. Holding altcoin actually give us bigger profits when its price pumped. we have additional value when in btc rate increase ,so we will have more btc if sell it and just waiting btc rate to dollar increase.