They are not lucky. They understand bitcoins value ahead of us. That is why they bought it and hold on it even when it was still almost no value. And they are now reaping the profits of it. It is not too late. Bitcoin can still grow more, and someday someone will say, they bought at 600 and now enjoying millions in profit.
I agree with you, they are not that lucky. But those people who can read the situation and take advantage of opportunities, even dare to risk investing in bitcoin at the time
It is good if you can invest your bitcoins on the legitimate company or site but the thing is if your lucky to see one, but you will need a courage to gamble it and I think if you really don't want to risk you money or bitcoin then don't do it and just trade your bitcoin and there are other methods in increasing your bitcoin!