When we know that the bitcoin supply is fixed, and at some point, there will be a time when owning even a 0.1 BTC would not be so easy.
You are right, I believe Bitcoin will cost $1 million at some point in the future. When the price of 1 bitcoin reaches 1 million dollars, the price of 0.1 BTC will be $100k dollars, which will be very difficult for many to buy at once, currently 0.1 BTC price is 10k plus, it is not possible for many people to buy at once right now. Now the price of Bitcoin in the past was low, so focusing on past prices will only have to be regretted, so always focus on the future and continue investing faithfully. Now the best way to invest is to deposit bitcoins in DCA method. However, to invest in Bitcoin, you need to plan for the long term, the longer you hold Bitcoin, the more profit you can make.