Imagine having one bitcoin.
You sell that bitcoin at the current price(around 3800 USD).
Bitcoin crashes again somewhere around Christmass and the price goes down to 1K USD.
You buy 3.8 bitcoins with the dollars you got from the previous sale and you HODL.
In 2019-2020 bitcoin recovers to 10K USD (or maybe reaches 20K ATH).
You have made atleast 38K USD.

I know it's not guaranteed to happen,but hey,this is the Speculation forum,so why not speculate about this.
I think that this is every crypto whale's trading plan for the next 2 years.
You should have done that during the previous year, if you had a bitcoin you could have sold that bitcoin for a price close to 20000 dollars and now you could buy it for a price below 3300 dollars, so that one bitcoin could allow you now to buy six bitcoins, but if you want my opinion it seems to me that is very late to try that strategy, because I really do not think that we're going to see a price of 1000 dollars for each bitcoin.