One regrets when one commits a mistake. However, mistakes are the stepping stones to learning. And our best teacher in life is when you commit a mistake. So take it as it is, move on, and find a way on how to correctly deal with it. They say that one should have done something about bitcoin year 2009 when it first came out. But past is past and we can never bring back the time. We need to deal with the present time. Currently on this date Dec 2017, bitcoin is rising and would most probably continue to rise further. What do you think would be the price of bitcoin 10 years from now? Perhaps, by year 2027, when you turn back to this post again you might see all sorts of regrets being voiced out by some people. If only I knew... if only I have bought... if only I have done... if only... if only...