Yes of a truth, on the note that the early you invest the the more compounding interest works to your advantage over those who started later on.
But you could also set in today and with your investment be far better than those before you since the beginning of the year, some started earlier but couldn't maintain and keep up with the market and their investment was withdrawn out of fear for loosing the money, we can also have someone who recently started investing in bitcoin, understand how to trade is could be making more profits while he's still having more coins in his portfolio for hold over the bull season aside the trading he's into.
But if you understand your asset(Bitcoin) and know the reason why you are buying (which should be for long term) then there should be no reason for much regrets, nobody can perfectly time the market when to buy, the most important thing is to buy because the feeling of regrets might makes you miss out the next opportunity.
We cant be always accurate even on how we speculate the market, but believe me, there's a way we could be more close to achieving the best about the market trends if we really ho to.
It has been said that the best time to enter the market was yesterday and the second best time is today, this bring about those procrastinating buying Bitcoin or those talking about the best time to buy, is never tomorrow regardless of the speculations on both the bear and the bull seasons, if you can't buy now there is no certainty that you will be able to buy tomorrow.
I still believe that the future with bitcoin investment is as interesting as the ones other investors had enjoyed in the past, we can begin the journey to our own now to enjoy more better with the future ahead when the time comes, only if we are investing now and holding till then.