now the bitcoin has reached 8000$ and the altcoin is starting to move up. can this survive or there will be another fall. can this be said that the bear market is over?
We could not say that the bear market is over because the market is still unpredicted. Perhaps you remember what happened in a few days ago when bitcoin reaches the very high price but then suddenly, the price has dropped deeper and makes people panic for a while. But then the price can increase higher and stable in the price before.
That could happen again at this moment because we don't know what will happen later. As long as you can use the time to buy and sell and take the profit, you will be fine. Bitcoin will increase more than $8,000 and even it will reach more than $10,000 so you need to be prepared for the real of the bull market.