There is no one who will know and believe that bitcoin can do that even satoshi itself. Because I only the first intention Satoshi made bitcoin was for an alternative to pay something beside money fiat. But, do you see now? How many people or even merchant who accept bitcoin as a payement system? I guess it is a few. Most of bitcoin's user now are only use bitcoin as mean of investment. More than that with the fee issue who made mant people reluctant to use bitcoin as payment system. This is why, there will be many people who will be regret to sell bitcoin at the low price. It would be different if you have known that bitcoin will be like now, I'm sure you will still as much as you can.