only about 0,01% of human population has bitcoins right now.

If bitcoin becomes popular (which it should), you'll still be one of the early investors.

As long as bitcoin has not yet replaced VISA as a payment method, you're not too late to invest in bitcoin and expect a large profit.

Once bitcoin has replaced VISA, you'll probably not make a substantial profit of bitcoin anymore, but you'll still want to buy it because of the utility it brings.

So, unless bitcoin completely crash to $0 it's ALWAYS a good idea to buy, no matter the price.