It is not still too late to invest in bitcoin. When the price was $12, some people will say it is too late to invest in bitcoin. When the price was $1000, some people will say it is too late to invest in bitcoin.
But now bitcoin has become the king of cryptocurrency.
Point of corrections, bitcoin did not become the king of crypto. Bitcoin was and is still the king of cryptocurrencies.
In the next 10 or 20 years people who have not seen the value of Bitcoin, today might still look back to this day and wish they had bought it when the price was around $400k. Bitcoin is an asset that keeps increasing in value, and the number of people that bought it when it was created have increased geometrically, this has also affected the price to increase, therefore in the next 10 years, as more people are adopting it, the demand and price will also increase.
Bitcoin, was and still remains the king of cryptocurrency, so OP now is still a good time to start accumulating and hold it, it's like a good wine that gets better in taste and value as the years passes by.