Last year ethereum also experienced a decline as it is now, but to my knowledge does the price not fall as badly as this? how could this happen? what is behind it?
You must know that bitcoin is very binding on the market, because of that the effect of decline or growth will affect all crypto traded.
but this is not the end of special crypto trading for eth, I think there are some new rumors for eth next year, one of which is a hard fork that allows growth to occur.