I have some bitcoins in an exchange and I found today that, without any transactions being made, the quantity has gone down.
I have contacted the exchange who have said:
the balance varies according to the prices that are floating
Is this correct? In my view the quantity of bitcoins I have should not fluctuate, only the value of said coins. Or am I missing something?
Any explanations would be great!
The total bitcoin quantity does not change (the 21M) but the useful bitcoin quantity can change but not drop.
People lose their private key or their wallet data or people "burn" them but this does not make the bitcoin quantity going down.
What the exchange has told you I'm know sure what they meant by that but that does not make sense.