It will take strong faith in Bitcoin for those people who received the 25BTC airdrop to hodl till date. They wouldn't have been able to overcome several faith-shaking FUD. For those that kept the faith, their profit is a motivation for us to keep hodling. In the future, we might look back and say that the Bitcoins we are earning or buying currently are like airdrops because the price will be what most of us might not be able to afford.
However, it makes me believe that there are some coins that we think are trash, which is not the truth, and those coins also need to be hoarded because they may generate money that we don't expect.
Most altcoins' price follows the movement of the price of Bitcoin. There might be some coins that have such potential but why go for copycats when you already know the original? To keep increasing my Bitcoin hodling is my only option instead of taking an extra risk on altcoin.