In what direction? We can have these market spike to the bearish or bullish side, so what would be the direction to exit the market when you spot a spike? Having this kind of mindset as a trader would ruin your discipline and over time you find yourself in losses. You might think it's a good thing to exit early just because the market wasn't favourable but it's not. You have to be abel to stay strong as a trader, no matter what direction the market is heading. Once you have your confluence you let your trade play out regardless of the outcome. Trading was never meant to be easy, but if you build a wrong mindset it would make it more difficult for you...
That might be a spike in the upwards direction just because of the sentence "Early birds get the worms."
Anyway, this is more applicable to those position traders who have been holding their Bitcoin alongside other altcoins for years already, and TBH, I'm also waiting for the final spike towards the upside before I sell all of my altcoins. Exiting early can be a disadvantage or advantage for you, but most of the time, it will be a disadvantage. Anyway, just like what you said, trading isn't that easy because it will test you in every aspect. From decision-making to being disciplined, from being patience from not moving until the setup isn't an A+ to everything that you need from trading. Of course, it will cost you money along the way, but as soon as you learn it and you're profitable already, that will be forever AS LONG AS you're trading.
As for OP, maybe specify that "SPIKE" that you're pertaining too because it can go both ways.