2017.....
When BTC price went from 800 usd, to 9000 usd, in 11 months, and then in just 1 month went another 3 fold.... to 20 000 USD, sky high.
What do you think was gonna happen? BTC would keep rising ? Remember: the sky was reached already.
This type of price correction is a very healthy sign of market being not that infant any more. Also now when the prices went down -20% / -40% or even more in other altcoins: the real money is there - all the speculative capital already retreated from them, all the scared speculators ran away too.
This is the time to get your cash together, and start buying really good project coins.