Selling them at current price is a good idea, if you bought your bitcoin price like 1000-1500$ then today you can get great profit from them, but if you need more than hold it because I think price next few months will be 6000-7000$ About Peak of Bitcoin price no one knows that
Yes you are right peak price cannot be predictable because bitcoin is just started to grow and it will never stop until it rules over the global market, and yes if you wait then you probably get more profit from it, and you will be more attracted toward it once you get more profit, but one thing I must clear the incoming 2 years there will be no end point of bitcoin price.