The above picture states very clearly the regret most Bitcoin investors are going through now.
I was just going through my telegram page when I bump into this in one of the crypto airdrop group, so I decided to share.

Most times as humans we feel more regret for the action we didn't take than the one 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.