2023 turned out to be a relatively calm year; over the past 9 months there have been no strong dumps or major pumps. In general, this may indicate that Bitcoin is increasingly perceived as an asset for long-term holding, and not just another speculation for trading on the exchange. This is also evidenced by data that the number of bitcoins in illiquid wallets continues to increase. At the moment it is more than 14,500,000 BTC:
Your observation and insightful analysis of Bitcoin's historical data and in particular its decreasing volatility in past nine months, is a very interesting and positive development, that could contribute to greater Bitcoin adoption and acceptance as method of payment. This reduced volatility is a significant factor that has often hindered its acceptance as widely used payment method.
Moreover, it is worth noting that volatility in Bitcoin is an opportunity for professional traders to generate profit by skillfully mitigating risk associated with trading of this digital asset.