Which is the lowest price according to you? Can you judge that this is the lowest or best price to buy bitcoin? I don't think that is ever possible, buy when you have money and you are comfortable with price.
For me, the current price of $430 is quite low. We might not see this price in the next few months.
I am also buying Bitcoin too for a low price. But I think it will be more worth later I mean after halving time and that we can all sell it with much profit.
But you must to take the risk that you are going ti invest in Bitcoin. There is a small chance that you can lose your money. Because the value can maybe fall.
Buying at low price it is the best time to buy bitcoins, all investors and bitcoin buyers are relying to that scenario. They wait for the time of bitcoin
to low its price and after sometime they know that price will rise soon.