It's not always that some news or events are causing the drops.
Sometimes it's a natural cycle and we are experiencing a correction now. Have a deep breath, take a look at technical analysis and relax. Here is a good example: https://www.tradingview.com/chart/BTCUSD/KRIcrA27-Bitcoin-USD-Buy-in-Re-buy-Levels-End-of-Correctoin-Altcoins/
Dips are as good as tops. Just use the moment wisely. Relax and have another good day ;)