You invested in a ICO or IEO project at 1$ per token or coin and the price surge up to 3$ but because you see potential in the project you decide to hold and after few months the price goes down to 0.45$ and after four years and the token surge back to 3$, my question is why the wait? You hold a coin for years just to go back to it's ATH (All Time High) ? And most times majority of coins don't go back to their ATH ever again, what could you learn from this? Never ever hesitate to take profits, even if the project is the best ever, take profits, invest again when price is down because believe me, the price will surely go down
Well the reason why investors are not selling even the price is high enough to take profit is because of their mindset that the value will increase further. Greed of wanting for higher price, most of us have thoughts like that but we should not be too greedy to let the chance of selling passed by just because its not the price you want to sell.
if humans are programmed to see the future won't we all be rich?
Probably, but unfortunately we dont have such capabilities thats why we are just speculating on the next future price.