It is advicable to keep any future accumulations private. How much BTC you own is not something you publicly announce here on the forum, or anywhere else, especially to people who know you personally.
Exactly, it is good to be private.
Another advice would be storage methods. Since you're on the forum, you'll probably know the most recommended wallet softwares are electrum and Bitcoin core. For higher amounts of Bitcoin, it would be wise to invest in a hardware wallet.
For frequent transactions, hardware wallet would be advisable. But for save keeping, also other cold wallets generated on airgapped devices are recommendable. I mean paper wallet generated in airgapped device and also a wallet on airgapped device. As long as the person is not spending from it. He can just be tracking it with watch-only wallet using master public key import.