The price of Bitcoin is determined by people's needs. Daily price fluctuations are due to someone buying and selling Bitcoin. The high volatility of Bitcoin indicates that the daily trading volume of Bitcoin is also very large.
The purpose of our investment in Bitcoin is to profit from it, and the profit is to satisfy our daily lives and improve our quality of life, so why not use Bitcoin after we invest? Investment is not just to make profit after accumulation, but to make this investment meaningful.