It's well known that bitcoin has a high volatility, caused by whales and pump and dump groups, in order to make profits. The price is also influenced by FUD, to give bitcoin a bad reputation. And the price also affects altcoins.
The price did drop from almost 20K to 6K in in February, but hopefully it will rise again and reach 20K again at the end of the year.
In short, many factors affect the rise and fall of bitcoin's market price so we can't tell which specifically is causing the dump. Though the whales is not active now, factors like negativity and bad image are affecting bitcoin badly. The internet is flooded by bad news about bitcoin being a scam when the truth is, bitcoin is being used by fake investments companies. Some people are also selling because of giving up, it had been a long wait for bitcoin to rise again and those people are not happy holding anymore.
Price is at dump and will only shows small recovery and then will fall again. I don't know if it is okay to consider that bitcoin is having a stable price now.