most of cryptocurrency are red for now and down in USD terms,, especially bitcoin
at this moment bitcoin price down below 10K USD depends on coinmarketcap data
is this the best time to buy more bitcoin ?
Yes, it is best to buy bitcoin at a low price. As one strategy says " buy low and sell high". It is an opportunity to invest at a low price. The crypto market trends it seems that it will rise in the end of the year. So invest now.