When do you think will be a best time to buy bitcoin and when is the best time to keep bitcoin first before selling?
For me this is the right time to buy bitcoin and you can be the best if you are going to buy bitcoin right now and start trading with his altcoin maybe in the market is better and holding bitcoin before selling is really good when the price is right then the profit is very right.
You know now bitcoin is $730, and it is really high price and as you said it is good time for buy the bitcoin, No way, i am seriously surprised, because many time i bought the bitcoin but in a low price when bitcoin have half price. But it is your thinking and i respect it, but in my view, it is not best but still good time to sell the bitcoin.
Current levels are by far not the best time to buy yourself some coins at. If you consider how much the price has gone up already this year, then you'll also realize that it can't keep going up endlessly. At some point the market will start to consolidate for a long period of time. If you're looking to invest in Bitcoin anyway, then at least make sure you buy with only 10-25% of the money that you have free for investment purposes. If the price happens to go up further, you'll benefit, and if the price starts heading down, you'll benefit as well as you can then buy more coins at cheaper rates. You benefit either way.