If the bitcoin will crashes and drop in $1 i think it would be the right time. I will buy many bitcoin as much as possible. And i will wait the day that bitcoin will rise up again.
Stop dreaming mate bitcoin will never fall that low now and if it goes back to $1 then it would be an end of bitcoin as if it falls that low then firstly you need to check the reasons of price crash and if there is anything really serious then you cannot afford to keep on buying it blindly as it may disappear after that but I don't think that bitcoin will ever die or ever fall to $1 price as that price is history now and even if the price of bitcoin falls in coming days then also it won't go below $10k usd and if price crashes then the best thing would be to buy more bitcoins at lower price as in future price will rise once again.