In your opinion, Are those coin or token from airdrop are worth to hold? Can you say that you have to dump it when the price in the market is pumping or it's better to hold it and wait when the price is mooning?
Thank you for your answers.
1) Dump when you think the market has peaked (sometimes you can get caught in bear trap, and coin will go higher).
2) On very very rare occasions, you'll sell and the market will hold somewhat steady near its peak. Holding airdropped coins and gaining value over years is so rare, that you'll be looking for this unicorn all your life. Don't wait, unless you have undying faith in your coin. One recent (somewhat of an) example of this rare occurrence, is with Hydro (airdropped coin).
https://coinmarketcap.com/currencies/hydrogen/#charts even though it held somewhat steady, it still pumped and dumped heavily.
3) If you absolutely have faith in the coin, sell high (on pumps) and buy back at about 35-70% discount (depends how near the peak you sold), good rule of thumb. There will always be a chance, no market climbs forever.
4) With any airdrop coin, the price will peak (talking about like 100-200% increases here btw), at one point or another, then the price will fall heavily. My advice to you, is gather every airdrop coin's market history and compare their pumps and dumps. (aside from NEM, which was a unicorn and a crypto bounty/airdrop hunter's dream)
5) I always tell myself this 1 rule "What goes up must come down," and it has always been true, law of gravity applied to crypto markets (what i say to myself). The trick is how far up, how far down and how long; That's a millionaires secret.
Warning: This is just my experiences and what i've learned. Always DYOR and invest/trade carefully.