When the btc price goes up, what is now a good time to buy altcoin or sell bitcoin?
Yes, this can't be deny due to its always happen most of the time, but when there is dropping the price value happen well, expect also for the coming increase again the original price or more of it.
Doing that is a tedious and risky process, better to take this opportunity and trade Bitcoins as much as possible, whenever bitcoin increases, I just sell part of it and when it dumps, I can buy more of it with the same price.
Yes this is the right time to trade Bitcoins. When the bitcoin price jumps to $2500 and reached $2900, all Bitcoin traders are switched to altcoin trading. Because it is easy to trade and the profit is also high. But now all altcoins are stable, and there is no more fluctuation in altcoin price. But bitcoin's price is varying the very high volume. So now bitcoin trading is best to make money.