Well, honestly, mate, I've also observed that during the recent time after the Trump administration came into view and after he added Bitcoin into the national reserves, the Bitcoin price has been more volatile than before. Do you feel the same? CMIIW!
The world economy has also become more volatile since he became president, so don't be surprised to see bitcoin become more volatile lately. Trump is an erratic president and often loses control of his words, so we may see more volatility and instability in the future. But bitcoin volatility is due to macro news impact, I don't think it has anything to do with US bitcoin reserves.
Furthermore, bitcoin is already a volatile and news-sensitive asset, which is nothing new. So with or without Trump, bitcoin will still be volatile, and the degree of volatility will depend on the health of the economy and investor sentiment .