Those people who keep saying that cryptocurrencies are big ponzi scheme are the people who doesn't have information about what it is. They are victims of misunderstanding and fake news. They will regret what they say if they fully understand what it is and its function.
We cannot avoid that there are people spreading negative news about Bitcoin,maybe those people have negative experience in Cryptocurrency or they don't have enough knowledge about it that's why they want to make Bitcoin become worst by spreading fake information.
We should get used to it and we have seen hundreds of attacks towards bitcoin and crypto that this is indeed a scam but look at bitcoin it stood still for 10 years inspite on having those
fuds and false news towards it.
People who do call it a ponzi scheme are those who doesnt even know on whats blockchain technology.This isnt only a great tech but also gives out some earning opportunity.