I bought 3 btc on credit for 19k about. What should I do? I am way underwater.
The best you can do now to your btc is to hold it. Like all people say here always careful when you buying bitcoin always buy when it's dip don't buy when it's high price because it's more chances to lose a profit when bitcoin go down the price.
The greatest problem is that he bought those three bitcoins on credit unless he's able to pay that credit with the money he's earning from his job then the interests will begin to accumulate and if he bought with a credit card that sometimes have interests as high as 50% per year then it is likely that even if the price of bitcoin went up he will not be able to repay his debt.