now a lot of money move to bitcoin, so altcoins price will down, but for a good project like NEO
i think, this down price only for a while
I think that's exactly what's happening--a lot of money people are using for crypto investment is being funneled into bitcoin and out of altcoins. I've definitely seen that happen a number of times in the past, and what that tells me is that now might be a great time to buy some decent alts, and NEO is one of them. In fact, I just purchased a few the other day on Binance and can't withdraw them yet because of the hack.
OP, I wouldn't worry so much about short-term price movements like this. NEO is a solid altcoin, and it's one of a very small handful that I actually own. The crypto market is extremely volatile and sometimes prices just sink like this. I'd say buy some more NEO if you have some extra money, but at the very least don't sell in a panic. The price will recover.