It's not too late, however, try to be careful.
If possible (but hard to spot) try to buy when Bitcoin is a bit low(er).. like it happened shortly some 4h ago.
If possible try to not get too emotional, Bitcoin has ups and downs, it can happen to get lower price at some point after you bought. Keep in mind that it should go back and even higher.
Very important: don't invest what you don't afford to lose.
And last advice: never get investment advises from random people over the internet. Use your best judgement.
i think it is, because in the year 2011 you can buy a Bitcoin for only 4$ and if you buy 100 Bitcoin before and you still have it now , then you are a millionaire , and if you buy bitcoin now it's late, because the price of BTC now is expensive
In 2011 it was an unknown something. For that it was pretty expensive.
After the 1200$ and the crash to some 200$, the current 2500$ is a lot, I know. And what if "they" are right and Bitcoin will reach 500000$? Isn't the current valuation still an opportunity?
As I said, OP has to use his best judgement for this.