In my opinion, the easiest way is to invest in the first 5 currencies from the top. In this case, you don't need to do anything. But it will bring you profit over the next few years.
You are right but I have various sites without investing in these first 5 coins in this forum Bounty, Airdrop Signature Promotions etc. You can also earn some of these but you must have knowledge of work before working.