[scorpion032]

To judge it like this you need to compare.

To compare, you need to measure the attributes of the this and the compared entity.

The alternative entity compared in this case is the Existing Financial System that is handled by the Fed, Wall Street and the Bankers.

Now, there are innumerable number of comparisons and metrics that have already done this job for their preferred metrics and statistics. They all unequivocally side on the side of Bitcoin. (one example: https://wtfhappenedin1971.com/)

You are free to ignore these comparisons; but you have to compare and contrast that how cryptocurrencies, if ponzi compare to the modern financial system of all it's warts and what is the net effect of Cryptocurrencies and the Financial system as it exists today; rather than simply stating Cryptocurrencies are in and of themselves Ponzi.