I am super excited to have become a Satoshi millionaire today and am going to hold on to this and also accumulate more subsequently.
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.
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.