One of the biggest challenges that we will encounter in Bitcoin is the Scalability problem which means there is only limited amount of information that can be contained or its capacity. I'm sure that there will be more people who will going to join the campaign which will result to a possible delay during processing or trading. So how can we provide a solution on this or how to ensure that all the trading done were saved once delayed before bitcoin achieves mainstream adoption?
one of the biggest challenges that I been encounter in bitcoin is when i badly need money and bitcoin was still dump. then i just sit there. thinking if I sell my bitcoin. im so sad that day. cause my bitcoin was exchanged in very small amount of money. then the next day i trade my bitcoin closely so i can gain an extra amount of bitcoin. i profit more that yesterday. in my experience we should take the risk to gain our goals so we can live happily.