Most times as humans we feel more regret for the action we didn't take than the ones we took.
25 October 2011 he was happy that he didn't buy Bitcoin when it was $2.70, but comparing gap in price between then and now, is quite a lot to feel regretful.
So in my own opinion, now is not too late to buy Bitcoin because it's still in it early days, and am quite positive that in 10 to 20 years time from now, Bitcoin has the capability of doing 10x to 15x of it current price, so it is best to act now that the opportunity is still there.
I won't blame the guy too much because that was the early days of Bitcoin and anyone can easily not believe in it, and many of the people blaming him may not have seen the big future for Bitcoin back then.
But if he had the knowledge about Bitcoin back then the amount was low I will want to believe he still kept track on Bitcoin so if he miss Bitcoin at that price the. He should still have got in at anytime the price was low.