Can you use BTC without mining? Question: Can I just buy/sell/trade to BTC and hold it and still be profitable? I mean with money you'd need to invest it in stocks, bonds, and etc to make more cash and simply holding on to cash over the long term means the same as losing money. Is this also true with BTC? Will I be losing money if lets say I buy 2 BTC coins and just leave it alone without investing it?
Yes, for most people it is an easier option to obtain bitcoins through an exchange (or a private trade perhaps) than through mining.

The current market price of Bitcoin is essentially based on a balance between 2 outcomes:


the anticipated probability of Bitcoin becoming completely worthless in future (eg if the encryption failed, or maybe if multiple countries outlawed it)
the anticipated probability of Bitcoin becoming far more popular (and more highly valued) than it is now


The first outcome would probably lead to a price of around zero, and the second outcome could lead to a very high price.

No matter what you believe, Bitcoin is dependent on many factors beyond the control of an individual.

If you hold on to bitcoins, you're essentially hoping for outcome number two.