Okay so earlier I came across a site that claimed that it's possible to get bitcoins for free by just; playing offline and online games, watching ads and videos, participating in airdrops and so on...
I saw that 1 BTC was allocated as the main prize of the contest, but I do not know how honestly the results are summarized and indeed this bitcoin is transferred to the winner. It is more realistic to get a bitcoin particle through a faucet, but this is too small a part, which is measured in cents.