Ofcourse. For me it is the heart of every project. When you want to invest in an ICO be sure to read the whitepaper first too get some idea wether itbis credible enough
Yes, though there are some airdrops that will give no value token. Still there are some that is profitable. Just be vigilant enough to spot an airdrop with high potential.
That could be answered by yourself. If you are happy with the current price then its definetely the right time but if you think you still wsnt more then hold it a little more.