There is no specific age that is too late to invest in Bitcoin or any other cryptocurrency. It's important to keep in mind that the value of cryptocurrencies can be highly volatile, and you should only invest what you can afford to lose. It's also a good idea to do your own research and understand the risks involved before making any investment decisions.

That being said, age can be a factor to consider when making any investment. It's generally a good idea to have a diverse portfolio that takes into account your age, risk tolerance, and investment goals. If you are approaching retirement age or have other financial obligations, you may want to be more conservative in your investments.