you think this is the right time to buy and hold bitcoins? because from 19k its 11k today. 
No one knows the honest answer. But sure. Buy in.
It has the potential to go up. Nut it also has just as much potential to go down.
Also look into some ALTcoins.
true, no one knows what what mighy gonna happen to the.price of bitcoin but if you were to ask me. Yeah, I would rather buy it now and hodl because now is the great opportunity to buy bitcoin at its cheaper price because sooner it will rise again. you can make profit from buying now and sellig later or for long term investment.