You know what mate? I was like you before. I just ended up quitting regretting because no one will ever know when and how much the price would go up/down. I learned to just play along. Sell whenever there is a slight rise and buy whenever there is a slight drop. Do not wait for a big one because it is not gonna happen.
this is true , and i like your argument , but who know about up and down price with very true ?
No can say or no one knows until when is the price of bitcoin will keep rising. It is up to you how you can manage your emotions for holding it. How long are you willing to hold it. We must remember that greediness always give bad result. If you are afraid that it might drop any moment and it is the maximum price of bitcoin it can reach then you can sell now your bitcoin.