Hello friend @crypto.piotr

Without a doubt, the past three weeks have been very marked by emotions within the market of the criptomonedas, many may have taken advantage of the recent high volatility, which has been developing specifically the BTC, in relation to the Flash Crash you mention is something that repeatedly tends to make the Bitcoin, and that is one of the reasons why our trading capital should be at a high percentage in stable currencies in my case I use USDT, also don't go buy when the price is in the areas of distribution (sales area) as a matter of fact was the BTC in the 53K, the price was expected to collapse to the more solid previous support.

I agree with you with those of planned and executed, the market is highly manipulated, so I think that when large corrections come, or upward exits in a strange way they coincide with news such as those of El Salvador.

Best regards, good luck.