I guess you aren't the only one in this regret business over not accepting Bitcoin far back in 2009/2010. There are many more your ilks here. But you folks got to move on
Unfortunately I feel agree with your answer. No matter how regretted we are too late to realize the potential of bitcoin in the past it will not change the state and reverse time into that period and we better start accepting it instead of regretting the past.
Also even if we did know about bitcoin back in the day that would not mean that we would have invested in bitcoin, at the time only a handful of people in the world believed in bitcoin, even satoshi had his doubts when he said that he believed that bitcoin had two outcomes being valueless or being worth a lot of money there was not a middle ground.