Absolutely, there is no need for the rush. Much is not gain at the moment so why do you worry yourself that much by selling your coins now. Hold on for a while and you will see the difference.
That depends on your situation. E.g. I sell it cheap because I guess there will be a price decrease in new projects most of the time, afterwards I will get it from cheaper. If you can evaluate a better choice, holding is not always a solution.
Agree! There are times that you need to sell your coin for you to earn profit. There are coins that are not for long term investment. If you keep on holding all your coins, thinking that it will increase in the long run, then you'll probably end up losing your money.
If we want to invest in the long term, we need to really choose altcoin. There are many altcoin in this market and there are many altcoin scam, in 2018 I have seen more than 1000 altcoin has become scam