The price of cryptocurrencies is determined by supply and demand, just like other commodities. Many alt coins are indeed scams or ponzis. Bitcoin has been demonstrated not to be a ponzi scheme in the classical sense, although it is certainly possible that they end up worthless in the long term anyway.
ok.yes when there is one who is having good demand others also enter to have same and in mean time scammers emerge also
so my question is so mnay saying we use same sturcture as bitcoin or else even more
so why so many in this thread claim that bitcoin only was safe
and there are no others who are genuine like bitcoin