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
I agree with the opinion that it is not too late to invest in Bitcoin at this stage. You just need to look and explore the chart, and understand at what price you are ready to buy it. Predict which price will be difficult in the future, but then bitcoin is the future and its value will increase - there is no doubt.