Recently, it can be seen that cryptomens are coming to the surface again for a segment that has not been interested in them so far. However, I often see a monotonous classification of cryptocurrencies and boxing into the NonGreen section. Everyone who does not know proper cryptocurrencies points to the amount of energy consumed by ProofOfWork extraction (transaction verification) technology. This is based on e.g. Bitcoin. ProofOfStake is less energy intensive than ProofOfWork.

I will not discuss ProofOfWork in any special way. I will just mention that the transactions are verified by the people who hold the cryptocurrency or stack. This is the so-called Staking and since no mining is taking place, it is not energy intensive to verify the transaction and close the block on the blockchaine. Anyone holding a given cryptocurrency participates in the validation as a validator. He will be rewarded for verification.
In short for holding cryptocurrencies, which e.g. you buy somewhere on the stock exchange you can get more just by holding it. You can build something like passive income, and I think it's one of the least risky investments in cryptocurrencies. The only thing that can betray you is volatility. However, this risk is at all, so it is important to choose well.

I went through three different staking programs. I will mention all three, the differences between them, and in the end I will mention a novelty that could be of interest to complete beginners.

1. Calisto (CLO) - Cold Stake - freezing of coins for a month
Staking approx. 12% / year
800CLO = 10CLO / month
8000CLO staked (5USD) = 100CLO reward (0.06USD) / month
Advantage: high reward for staking
Disadvantage: poor coin perspective and falling price

2. Crypto.com (MCO - CRO) - Cold Stake - freeze coins
Staking 4-14% per year (lock for 1-3 months)
5000CRO (800USD) staked = 14% / year = 700CRO reward (112USD)
Advantage: different staking portfolio and high reward for CRO native coin staking
Disadvantage: coins hold crypto.com - security / risk

3. Cardano (ADA) - Delegate Stake
Advantages: non-locking of coins, the delegated part must be the same at the beginning and at the end of the era. In the meantime, coins can be used e.g. for propagation through trading. Ability to send the coin reward directly to the Ledger Nano S hardware wallet. You need to select a pool to delegate and turn it on.
Staking 4-5% per year without locking coins
Advantage: Very promising project, delegation without freezing coins
Disadvantage: It may not be a long-term winner in investment and pricing

BONUS: 4. Algorand (ALGO) pure stake - 20 minutes
Cryptomena algorithm is a novelty in the ProofOfStake system and offers the most primitive rewards for holding coins. Apart from the purchase of coins itself, no further intervention is required. You will be automatically rewarded with this cryptocurrency every 20 minutes. There is no need to turn anything on, adjust, lock ..... nothing .... just hold.
The reward is about 5% / year
1000ALGO (375USD) staked = 50ALGO reward / year = 20USD at current price
Advantage: New project with Staking innovation
Disadvantage: The most unknown project with an unknown future.