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Want to thank to OP, Nice post. Many people may think of Bitcoin as a Ponzi scheme. If anyone looked at this pyramidal growth, it looks exactly like a Ponzi. But the points you added against Bitcoin vs Ponzi, I agreed with that. additional, Ponzi scheme is a platform where they take someone's investment and gives it to another one, Money is just change of hands. Uses of Bitcoin is completely different, it is used to transfer money quickly within a second without anyone's interference, to pay anyone through online and various purposes. So, the comparison of the Bitcoin with Ponzi doesn't make any sense.