If 1btc= $8000 in my opinion the good thing is to sell at this price because through this you will make some profit and the second thing is you will invest your current cash again in these crypto currencies in the future like the altcoins are good to invest in them they are reasonable in buying and are market oriented currencies. The best way is to circulate your money into the crypto market and other markets too.
Sell your bitcoin for another loss? That's very bad decision i suppose. When those people are realizing about the bitcoin and they should think for a twice about the bitcoin doesn't have any limit.
The price can be filled with various number. There is no reason to sell our bitcoin right now.