Example: I bought a bitcoin in December 2017 that time price of a bitcoin was 18000 USD.
Now 17 July 2018 I want to sale my bitcoin (today price is 7700USD 17 July 2018).
What price will be applied to my transaction?
The price on which bought or the price which is the recent price of bitcoin?
I think this time is a good time to buy . You can find the price is very low than 18000 USD . I believe this price will be back in someday . When the price get that time , I think you can earn a lot and that is very in possibility .