Never really been a fan of airdrops and anything that ask for referall especially investments is a scam in my book.
In recent years, participating in airdrops has been a real waste of time and money. But we shouldn't deny their potential from 2017 and before when many people were making free money from them. Many have even made enough money to have the capital to start their crypto investing journey.
Airdrops and bounties had their heyday and helped many people change their positions.
And to your topic, Bitcoin isn't just preferable it's the best option when it comes to other currency whether digital or traditional.
For retail investors like us, bitcoin is probably the best investment option as it gives us the fastest chance of improving our finances.