My regret about bitcoin is that I was late getting bitcoin information so I did not get a big chance to buy bitcoin in its early days. and I only found out about it three years later, but at that time I was not serious about bitcoin and again did not invest my money. I have two big mistakes I don't want to repeat again. so I will seriously pursue the bitcoin at this moment.
Me also, I don't even buy a single bitcoin when it value is still small and now I can't even buy half of it. I just do now is earning bitcoin in joining bounty campaign here and just forgot the past because I still can have more bitcoin if I stay here in bitcointalk.