i bought bitcoin when it was for $14 k
now it's less than $4k. i lost +10k per one bitcoin.
Bitcoin is worst investment ever i could imagine.
Sometimes what happens is not what we expect and it makes us disappointed and regretful. I think at the moment the right thing to do is keep hold of it and keep observing market developments at least the price can recover and reach the price when you buy it, because selling it at this time will be in vain because of the huge losses you get.