There are many ways to earn cryptocurrency without investing. I would suggest the best way to earn free cryptos is by joining the airdrops.
Airdrop refers to the FREE coins (free bitcoins/free crypto) given during the Initial Coin Offerings - ICO of the crypto companies in the holders' wallet in order to publicize their tokens.
Please stop promoting your website on my thread. Everyone knows Airdrops are giving free coins BTC or tokens during ICO or without ICO. It is not necessary to airdrop coins only if they have ICO.