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?
Whenever the price of a coin plunges, there is always a factor or some factors behind it. Sometimes, some people think its only shit coins that plunge, howbeit, it can also happen to genuine ones.
We are in bear market and Ethereum is not the only coin that us affected. Ever since it's been observed that so many investors have decided to pause investing in the crypto market, the marketcap has been reducing, so no one wants to buy coin at high rate, because they are afraid of what might happen next.
Nonetheless, improvement is now gradually setting in.