Whether Bitcoin is cheap or expensive, whether we still have a chance or it's too late to invest in it all depends on each person's risk tolerance.
Investing in any coin in crypto-currency involves risk, that's why investment experience, ability to analyze markets, control emotions and develop a risk-taking mindset are essential before investing. Investing in Bitcoin carries less risk than investing in other coins in the cryptocurrency market. I don't think bitcoin is expensive because you can buy bitcoin whenever you want according to your investment ability. You can buy as much Bitcoin as you want, and you can buy even a small amount, depending on your financial resources.
Seeing the rise in the price of Bitcoin, many people think that Bitcoin is expensive, maybe it is too late to invest, which is wrong. Because the price of Bitcoin may increase more than it is in the future. So you should invest in any market situation with a positive attitude.