Before I can tell about the reasons, we have to consider what ponzi is. What is ponzi?
I like a simple fact that says "ponzi is a scheme in which Peter money is used to pay Paul. I believe that example is a good definition on its own, in ponzi scheme, the people that started it gain the most, people that first invested are the second that gained in such a way that the people that invested late are the ones that lose. Check the diagram below:
https://www.google.com/search?q=Ponzi+scheme+diagram&tbm=isch&source=iu&ictx=1&fir=dxjUbGDCkvRQQM%252CsHiiS1Y747SmvM%252C_&vet=1&usg=AI4_-kT6_73-JQY5mKanO5LLbcIA1iPu9A&sa=X&ved=2ahUKEwjK_b-cxeDqAhWDxTgGHf2MC7YQ9QEwA3oECAkQIg&biw=1261&bih=2039#imgrc=dxjUbGDCkvRQQM
As seen in the diagram, it is a pyramidal scheme but ponzi scheme work this way too, let us consider the people that started it as 6 shown on the top of the pyramid, the 216 participants as the people that invested early, the 279936 as the people that invested but not too late, the rest up to billions of people invested late before no people are investing. If the billions of people invested, their investment is used to pay those at the top but how will they gain because nobody investing again.
People that stated ponzi gain from all investors and have the lion share.
People that invested early do not gain from investors but from people that invested late
People that invested late just lose because nobody is investing again.
The scheme failed.
That is why many ponzi scheme has failed in the past, some people still run ponzi and fail because they are liars, they sell fake products and services, lying to their investors until investors to be payed outnumber those that are investing and until the whole scheme failed. I believe we all know what ponzi is now. So let us dive into why bitcoin is never a ponzi in summary.
Why bitcoin never a ponzi
1. Bitcoin is decentralized, all ponzi scheme are centralized
2. Bitcoin is not selling any fake product or service, it is completely transparent.
3. Bitcoin is over 10 years now but has never failed, the future even seem brighter than now, ponzi can not last up to 10 years.
4. Bitcoin was even portrayed on wikipedia to be for scammers, but this changed, and was portrayed good now.
5. Many goverments against bitcoin before but now they accept bitcoin, there are even over 7000 bitcoin ATMs in the world now, and bitcoin is used for trnasactions like fiats, even used as payment on some online stores worldwide now.
6. The early investors gained, they were the developers but not in a way the late investors will lose, also many early investors sold bitcoin and makes it more realistic unlike ponzi that has nothing to sell. If you get the market right, there is always still profit in bitcoin.
7. Bitcoin is a very good and easy payment method acceptable in many countries now, has any ponzi been like this? No
8.
There are many other reasons to talk about because these are only few, bitcoin is not a ponzi like bitcoin haters are depicting it, it is completely decentralized and transparent, people that want to invest now should not be discouraged, if they learn how the market fluctuates, they will gain but they should also be mindful of the risk. Bitcoin haters should stop misleading people about what bitcoin is because they know nothing about bitcoin.