I buy bitcoins when the price is pretty high and when the future is also pretty attractable, right now as a example I would not buy it because of te fact that the bitcoin is too high for me to invest again in it..
Right now, the price of bitcoin is continuous raising, i think it's a good time to buy bitcoin. Because when the halving come, i'm sure the price of bitcoin will increase so high.
If you want to buy some Bitcoin is that you have to buy it low and that is because you have to know that the chance to buy low will be higher that you can make some profit with it so that is really nice.
But of course it is hard to know what will actually happen with the value of Bitcoin itself.
We were expecting that price will touch $800 by this time but at a moment price is at $635 so I think we can afford to buy at this price as price will start rising at the time of halving.