I am not agree with you on this matter. For me the bitcoins value not going down, actually it is stayin strongly in the market. Look at the last 6 months, all the coins have lost in the cryptocurrency market but bitcoin. The price never went down from $6.000. But if you look at the Ethereum the price went down from $400 to $200..
surely, the value of bitcoin always goes up and down at any time. so I will still trust bitcoin and I will maintain bitcoin investment. Low prices are good to start investing because you can get coins at low prices.