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
For me, is it to late to buy bitcoin because i'm sure that the bitcoin will rise again not now, but soon. We need to believed to bitcoin that the bitcoin can recover in it's fall.