Will bitcoin continue to fall to $ 6,000$-5,000$?Yesterday bitcoin has fallen below 10,000$. Today bitcoin continues to fall deep down to 8,200$ and possibly more.
I bought bitcoin at 15,000$. Who can advise me to keep or sell bitcoin at this time? Will bitcoin continue to fall to 6,000$-5,000$? what should I do? please..

Its market value at this moment already touched and crossed the 10000 USD mark once again and is now continuously increasing. Maybe this is the start of the recovery. Don't worry, fluctuations are indeed innevitable but it is natural. As we can see, dumps are just temporary so do not hesitate to invest and hold. So I think it won't again touch 6000 USD.
Actually it already touches more than $11K yesterday, but we experienced some minor selling that's why it hovering just below $11K. But its a good sign that we are not going lower that $5K-$6K because the new psychological barrier is $12K.
It will be a long road ahead before getting in a new all-time-high. But you are correct, we don't need to worry because eventually bitcoin will rally and the price will increase overtime. We just need to have a little patience here.