If you want want to keep that 1btc, without convert then that's also okey cause btc is the most secure investment with sure profit. Then you can keep half btc and rest of half can be use for top altcoins like eth bnb sol matic dot etc. If you want more profit then sui arb op could be good altcoins for hold , suppose to be bright future as they have additional new technology. Memecoins are bad but you may investment a little amount for doge coin which is now top altcoin
I'd keep that 1 BTC.
It's hard to acquire and accumulate that whenever you're going to start going to zero and you want to invest that in different coins. Some may be good and profitable through altcoins but you'll never know if it's going to be successful as what you're thinking.
I will keep that one whole BTC and then will use my other source for buying other altcoins if I insist of buying and that's the tip that I'm giving to OP and for everyone who has successfully achieved to own 1 BTC and then want to scatter it through altcoins.