I believe we don't have to worry if we are holding coins on one of those top 10 altcoin especially ETH.  They maybe in a blood bath now but just wait and you'll see that this are just a good opportunity to buy altcoins  and it is given that we should do our own thorough research once we wanted to invest in altcoin, and with a good development team strong community  business alliance and partners, I think it is ok to hold these altcoin for a long term investment.