I think there are many factors involved. A few of them may include:

1. FUD from major news corporations
2. So many new blockchains are being created, the wealth is being spread among them all.
3. Many new ICOs are closing down, the wealth is disappearing with them.
4. A general decline in news coverage, and people searching for the keyword bitcoin.

I think you will find with bitcoin, the price goes up and down alot and we are simply in a down trend. The price can't always increase in price, and we need new buyers and users coming into the crypto space to allow it to continue growing.

There are of course many more factors involved, but i believe these are some of the biggest variables when looking at the crypto prices.