If you look at the Charts last year at this time its not dropping its worth more then till last year - if you bought at ATH your portfolio looks bad now but still wait to the end of 2018..

don't think there is a specific reason for the coins dropping.

the markets are being corrected probably, some fud and some manipulation as well

because, I think not all altcoins go down because there's still a good thing to invest and pick some and not all altcoin down because bitcoin is not just your coins that drop every Cryptocurrency, do not sell your altcoin because altcoin falls together with bitcoin 

Altcoin are dropping because many people who sell their coins in the market so that stock so much

They are dropping cause bitcoin is dropping. And bitcoin was dropping cause MT GOX trustee was dumping the coins in large amounts in open markets instead of OTC. And the reason altcoins were dropping is cause they are still tied to the price of Bitcoins and a drop in bitcoin price leads to drop in alts.

Currently, many falling coin prices are caused by several factors, including the many oblique issues of bitcoin, the number of countries that start banning the use of bitcoin in their territory. People started selling their coins, causing the decline in the price of the coins, and the number of new coins that sprang up, making the other coins down in price.

Yes all of alternative coins followed bitcoin's price, due to bitcoin is first cryptocurrencies in the world, so the alternative coins will follow bitcoin's price, bitcoin is the leader of cryptocurrencies in the world, if the king is falling all of the followers will be falling. It is the most reasonable answer about the alternative coins price went down trend now.

Actually i am not really surprise with this condition where all the market is just red.
But when i run my day and see more and more altcoin going drop together and i feel hard to recover. FUD news makes us so painful.

Panic is the reason for the price fall mostly but now the price is falling due to bear market so the price may expected to rise at the back end of the year so hopefully price may rise at June or later.SO everyone hold their coins because we didn't lose anything until we sell our coins.

Most of the altcoins based their price on Bitcoin, if bitcoin price will go down, for sure they will follow. I think that there are 2 main reasons why the price of coins are dropping. First is that we are receiving a lot of bad news from social and mass media like some countries are banning cryptocurrency. I think that is the major factor affecting the price of the coins. Second, if there are more sellers than buyers, price will also go down. Many buyers will ask for a low price since there are many supplies.