To figure out if you are "loosing" or profiting off of an investment the first thing you have to decide is..... What is your end goal?  For example in this market are you trying to gain BTC value, ETH value, some other "altcoins" value, or fiat value?  If you are just concerned about gaining fiat value and both XRP and ETH dropped by 30% in USD then it doesn't matter which one you hold onto.  Likewise if you are just concerned with gaining BTC value compare how these coins/tokens have been shrinking/growing as compared to BTC.  If they are moving by the same percentages then it doesn't matter.  In the end if you don't move your financial value out to fiat or a "stable asset" you technically never make a profit or a loss anyway.........