I had a limit order in at $5520 but I've just taken it off because the price is falling so quickly. I want to increase my stash of BTC but want to be able to buy as much as possible.
If it goes through $5000 I think it could well go to 4300
I think you probably put it to low. I think that anything that is bellow $6000 is a good price to get bitcoin. Even now it seems to be recovering and consolidating again, so you probably wont have many chances in getting it bellow $6k. Anyway you should really look for the long run. You have the institutional money coming in to the market, you have the 2020 halve, so the fluctuations don't really matter. In the long run, even if the coins were at $8k they were still cheap, so in my opinion you can buy them now, if you have the funds to invest in them.