If you wanna sell your altcoins I suggest that you keep some. Maybe you sell 80% of your total holdings and 20% for holding or 90:10, it depends on you. Because no one knows, that altcoin might go to the moon after 1, 2 or 3 years. Just always check if it has a potential in the future.
I agree with you. For success to find us, we must give it a chance. I think any person will be happy if any forgotten coin will make x100 and provide him with additional income.