I suggest you Hold on!
Although the price is now falling, you bought three BTC for $19,000.
The price is now $6,600, and your 3 BTC is not getting any less!
The price will return to $19,000! Maybe more!
If you sell now, you'll regret it!
Well i think there is no other choice than to hold or else you will loss a huge amount .Maybe it is really a verry hard thing to do specially when you always see the price that slowly dropping down almost everyday it is really killing those who invest in the high price to see the present price fall.I think we must believe in bitcoin and it's capability to rise again to avoid stress.