Because in that same time span it means that bitcoin has gone up more than roughly the 5% that you gained in VEN. If that happens, you will be up in USD but down in terms of satoshi or sats for short. This is why some people like to hodl BTC rather than trade it because it is easier and gives peace of mind.
So I should sell when the value in terms of satoshi is UP, correct? USD doesn't matter?
For my opinion USD still mattters because in the last trading process, it is important for me and if your local country money is USD. Also yes when it rise you go sell it and enjoy your profits its like this
sell high buy lowHERE I WILL GET YOUR VIEW IN A PROCUCT IN A BUY AND SELL PROCESS
like buying products in a small about of price and selling them on high price (right price to be exact).
A quick note that you should study it too and base on the replies you got here because its good to learn for you to know the right decision even its good to get opinions from people here for you to know what you should do.