Is not a big decline. Yesterday was a good decline on 30k. Bitcoin is nearly 100 days moving average and bears control the market now.
This not looks good.
We have touch $40k today, a good indication that investors and traders are buying. We have like decline more than 50% in the last 7 days or so, but we should be glad to see the price growing again. If everything has settle down, then we should be seeing another leg up.
As for buying in the ~$30k, of course, bitcoin is in a discount so why not take advantage of it, continue to accumulate and then HODL, nothing beats buying in a dip.