Bitcoin is not a valueless coin. It has a great value and demand. We aren't able to earn bitcoin by doing nothing. People are seeking to get it free but in reality, it is not possible. We have to work physically or mentally to earn it.
That's is totally true we can never earn bitcoin or other cryptocurrencies if we don't work. If you already have a lot of money or simply you are rich, you can easily buy bitcoin and you do not need to work to gain bitcoin like what we do which we join and participate in different campaigns to earn bitcoin. There is no such word "free" in this field because in order to earn you need to work hard. Even you join in airdrop which you can earn free token you still need to do some task to receive the rewards.