hey guys

just wanna ask, say i trade a certain cryptocurrency against bitcoin, say bitcoin vault. Lets assume both of them grow exponentially against fiat currencies. Will trading the two currencies against each other make sense - like BTCVT/BCT, will the value of this trade increase or remain constant because of the individual growth of the 2.

Can someone balance me real quick, how do people get losses even though we know that Bitcoin is destined for growth?
is it because people are looking to buy and sell quickly which may result in a loss if market falls?
Because in my view i feel like buying and holding on to your bitcoin until its value has increased(which is an assured) will always set you for profits.

please correct me if im wrong...