Price is good to buy but I think we should try to have more then 1 btc as 1 btc is not too high amount to earn good profits but if you have more then you can earn higher profits.
I think it is good idea to buy as many bitcoin as you can up to 5% of your net worth. Do not buy too many.
You have said that it is a good idea to buy as many as you can and in the end you are going to be against to what you have said by saying do not buy too many. Maybe the right term is just buy as many as you can as long your pocket is able to manage to have funds with it.
it doesn't matter how much you buy bitcoin as long as you buy it at a good price.
for example in the last couple of days those who were waiting for a golden opportunity bought bitcoin at $500-$520 and will enjoy the profit today and in the days to come when bitcoin rises up to $800+