I say briefly what is the airdrop

When a new Cryptocurrency company like Bitcoin, Litecoin or Ethereum comes online Initially, those Cryptocurrency sell their coins or tokens at a lower price. So they give some coins for free to introduce their coins online and these coins are called AirDrop.

However, it is not possible to say that all the coins will remain in place because the Cryptocurrency website also can do scam sometimes.
We do not want to take the risk because there is a riskless investment method. That's called Free Coin Offering or Airdrop. It's basically a form of ICO. Here the coins will be given for free on the signup. In some cases, ICO's official Telegram or Like on Facebook or Twitter is to follow.

Bitcoin's market price was less than $ 1 in 2010, but now it is $ 3500+. If you keep free coins on 50-60 sites and there are at least 5 sites in it, then you can earn hundreds of dollars effortlessly.

What do you do with these free airdrop coins?

Free airdrop coins, Keep these coins until you have finished the entire lunch. When the sites are full lunch, you can take the coins on your Bitcoin or Ethereum wallet. Most sites offer Ethereum wallet in coins. That's why it's always good to use My Ether Wallet instead of Coinbase's wallet.

The sites can go to Scam. But its ratios are less, that is, the probability of most sites scam is less or equal. The price of any cryptocurrency cannot be told after a few days. The coins that cost $ 1 during the ICO, ICO may be $ 5 to $ 20 or more at the next. These sites are available from the first $1- $10, and the price of ICO can be up to 4 times or more.