why all coins are going down..? can i sale it or hold.
The reason why almost all of them are on a downwards spiral are currently unknown, I have no clue and there isnt any negative rumors about the cryptocurrency world to make all of them to go down in such manner.
A drop in bitcoin prices could cause investors to lose confidence in bitcoin, a drop in funding for bitcoin start-ups, and a wave of large-scale closures by some bitcoin start-ups, eventually creating a vicious cycle. These will cause the price to drop.
Of course because of fud, speculation, and badnews about the prohibition of crypto in major countries such as Korea, Japan, China, Indonesia. let alone these countries have a very large bitcoin users. of course it is very influential on the market country and make the market a mess because many users are afraid of the news. now the condition is quite improved but that most of the coins have not happened recover the price yet, including Bitcoin