Why bitcoin shouldn't be a scam ?
Who tell you it gone crash next month or next year ?
Ethd is not less good or much than an other coin, this is just a virtual coin like the others, lot of people seem try to predict future and have rational thinking in a totally irrational domain like cryptos.
A lot of people 3 years ago who say bitcoin scam when it was at 1 dollard, see what is became
Every crypto are ponzi pyramid, the only think to ask yourself is which people are gone put their money.