Should we hold on to altcoins which we have invested and see the price dropping every moment or it will be better to sell them or hold.
You are sure will listen to the opinions of others, while the others also don't really know exactly what will happen about price. Make sure you always see the price movements, learn all the techniques to decide on selling. The best solution is to make ourselves know what to do, the others just comment on you. We don't know the people who commented to you is people who sincerely give an opinion to or just some kind of trick to trap you.
Cryptocurrency not only serve the volatility of each coin price, but your mental will be confused to make things quicker. A little late you will get lose, a little late you will lose profit and a little late will make you to avoid reinvesting in cryptocurrency. So, be better for you fooled by yourself rather than cheated by others. Make the biggest decision of yourself, the suggestions of others make it extra to convince your decision.