events like this often happen and I think this is natural because all altcoins or crypto currencies are always close to zero.
besides that I also believe that this will return to recover or can be spelled out all altcoin will go back up.
Natural? I think its more than natural mate. There many reason why but i dont want to share fud again. While the prices are currently falling, there are very few chances that the landslide which Bitcoin suffered last year would repeat this year as well. And all back to normal again this end year.
Simple is the demand is decreasing. The prices of all other coins are basically tied to the price of bitcoin and when the price of bitcoin starts falling, then the prices of the other coins starts falling too. They are following the main basic coin price. Also so many coin and token addition is the reason why drop.