My profit strategy has been to cash out all initial investments if the return hits 100%. I play the profits in other opportunities. I don't base my decision on dollar value, I base it on percentage increase over investment.
How long to stay in a coin like PASCAL depends on your strategy. If you don't understand how the market works or understand if the community believes in the underlying coin, cash out once you make a decent return. Don't have regrets.
Remember a PASCAL coin is worthless. You don't want to be an investor in PASCAL you want to be a trader who used the coin to increase your money.